{
  "verse_id": "8.17",
  "mūla": {
    "devanāgarī": "सहस्र-युग-पर्यन्तम् अहर् यद् ब्रह्मणो विदुः | रात्रिं युग-सहस्रान्तां ते ऽहो-रात्र-विदो जनाः",
    "iast": "sahasra-yuga-paryantam ahar yad brahmaṇo viduḥ | rātriṃ yuga-sahasrāntāṃ te 'ho-rātra-vido janāḥ",
    "chapter_position": "Chapter 8 (Akṣara-Brahma-Yoga (The Yoga of the Imperishable Brahman)), verse 17",
    "speaker": "Krishna",
    "addressed_to": "Arjuna"
  },
  "word_by_word": [
    {
      "surface_form": "sahasra",
      "lemma": "sahasra",
      "grammar": "compound (compound member)",
      "senses_attested_in_panel": [
        {
          "sense": "-- इत्यादिश्लोकत्रयस्य पिण्डितार्थमाह -- ब्रह्मलोकपर्यन्तानामिति",
          "school": "viśiṣṭādvaita",
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          "witnesses": [
            "vedantadeshika"
          ]
        }
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      "theme_lists": [],
      "surface_devanagari": "सहस्र"
    },
    {
      "surface_form": "yuga",
      "lemma": "yuga",
      "grammar": "compound (compound member)",
      "senses_attested_in_panel": [],
      "theme_lists": [],
      "surface_devanagari": "युग"
    },
    {
      "surface_form": "paryantam",
      "lemma": "paryanta",
      "grammar": "accusative neuter singular noun",
      "senses_attested_in_panel": [],
      "theme_lists": [],
      "surface_devanagari": "पर्यन्तम्"
    },
    {
      "surface_form": "ahar",
      "lemma": "ahar",
      "grammar": "accusative neuter singular noun",
      "senses_attested_in_panel": [],
      "theme_lists": [],
      "surface_devanagari": "अहर्"
    },
    {
      "surface_form": "yat",
      "lemma": "yad",
      "grammar": "accusative neuter singular noun",
      "senses_attested_in_panel": [],
      "theme_lists": [],
      "surface_devanagari": "यत्"
    },
    {
      "surface_form": "brahmaṇaḥ",
      "lemma": "brahman",
      "grammar": "genitive masculine singular noun",
      "senses_attested_in_panel": [],
      "theme_lists": [],
      "surface_devanagari": "ब्रह्मणः"
    },
    {
      "surface_form": "viduḥ",
      "lemma": "√vid",
      "grammar": "past indicative 3rd person plural verb",
      "senses_attested_in_panel": [
        {
          "sense": "रात्रिम्",
          "school": "advaita",
          "weight": 0.8,
          "witnesses": [
            "shankara"
          ]
        },
        {
          "sense": "रात्रिं",
          "school": "viśiṣṭādvaita",
          "weight": 0.8,
          "witnesses": [
            "ramanuja"
          ]
        },
        {
          "sense": "युगसहस्रमन्तो यस्यास्तां रात्रिं",
          "school": "bhakti",
          "weight": 0.8,
          "witnesses": [
            "sridhara"
          ]
        },
        {
          "sense": "। तथा रात्रिं युगसहस्रान्तां चतुर्युगसहस्रपर्यन्तां ये विदुरिति वर्तते। तेऽहोरात्रविदस्त एवाहोरात्रविदो योगिनो जनाः। ये",
          "school": "advaita-bhakti",
          "weight": 0.8,
          "witnesses": [
            "madhusudan"
          ]
        }
      ],
      "theme_lists": [],
      "surface_devanagari": "विदुः"
    },
    {
      "surface_form": "rātrim",
      "lemma": "rātri",
      "grammar": "accusative feminine singular noun",
      "senses_attested_in_panel": [],
      "theme_lists": [],
      "surface_devanagari": "रात्रिम्"
    },
    {
      "surface_form": "yuga",
      "lemma": "yuga",
      "grammar": "compound (compound member)",
      "senses_attested_in_panel": [],
      "theme_lists": [],
      "surface_devanagari": "युग"
    },
    {
      "surface_form": "sahasra",
      "lemma": "sahasra",
      "grammar": "compound (compound member)",
      "senses_attested_in_panel": [
        {
          "sense": "-- इत्यादिश्लोकत्रयस्य पिण्डितार्थमाह -- ब्रह्मलोकपर्यन्तानामिति",
          "school": "viśiṣṭādvaita",
          "weight": 0.8,
          "witnesses": [
            "vedantadeshika"
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        }
      ],
      "theme_lists": [],
      "surface_devanagari": "सहस्र"
    },
    {
      "surface_form": "antām",
      "lemma": "anta",
      "grammar": "accusative feminine singular noun",
      "senses_attested_in_panel": [],
      "theme_lists": [],
      "surface_devanagari": "अन्ताम्"
    },
    {
      "surface_form": "te",
      "lemma": "tad",
      "grammar": "nominative masculine plural noun",
      "senses_attested_in_panel": [],
      "theme_lists": [],
      "surface_devanagari": "ते"
    },
    {
      "surface_form": "ahar",
      "lemma": "ahar",
      "grammar": "compound (compound member)",
      "senses_attested_in_panel": [],
      "theme_lists": [],
      "surface_devanagari": "अहर्"
    },
    {
      "surface_form": "rātra",
      "lemma": "rātra",
      "grammar": "compound (compound member)",
      "senses_attested_in_panel": [],
      "theme_lists": [],
      "surface_devanagari": "रात्र"
    },
    {
      "surface_form": "vidaḥ",
      "lemma": "vid",
      "grammar": "nominative masculine plural noun",
      "senses_attested_in_panel": [],
      "theme_lists": [],
      "surface_devanagari": "विदः"
    },
    {
      "surface_form": "janāḥ",
      "lemma": "jana",
      "grammar": "nominative masculine plural noun",
      "senses_attested_in_panel": [
        {
          "sense": "इत्यर्थः",
          "school": "advaita",
          "weight": 0.8,
          "witnesses": [
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        },
        {
          "sense": "ते ब्रह्मणः चतुर्मुखस्य",
          "school": "viśiṣṭādvaita",
          "weight": 0.8,
          "witnesses": [
            "ramanuja",
            "vedantadeshika"
          ]
        },
        {
          "sense": "। ये तु चन्द्रार्कगत्यैव विदुस्ते नाहोरात्रविदः स्वल्पदर्शित्वादित्यभिप्रायः।",
          "school": "advaita-bhakti",
          "weight": 0.8,
          "witnesses": [
            "madhusudan"
          ]
        }
      ],
      "theme_lists": [],
      "surface_devanagari": "जनाः"
    }
  ],
  "intertextual_panel": [
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    },
    {
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  ],
  "doctrinal_projections": {
    "advaita": {
      "reading_summary": "(reading summary extraction pending; ENABLE_READING_SUMMARIES=true to generate)",
      "key_cross_references": [],
      "witness_passages": [
        "shankara_8.17",
        "anandgiri_8.17"
      ],
      "score": 0.5,
      "english_rendering": "Brahman (brahmaṇaḥ, here Prajāpati-Virāj) undergoes a day of one thousand yugas (sahasra-yuga-paryantam) followed by an equal night — both rigidly bounded by kāla (time). Śaṅkara's commentary insists: because these cosmic cycles are kāla-pariccchinna (temporally delimited), all worlds within them, including Brahmaloka, are subject to punarāvṛtti (return). Only the one who realizes the timeless Brahman — beyond Prajāpati's counted days — escapes the wheel."
    },
    "viśiṣṭādvaita": {
      "reading_summary": "(reading summary extraction pending; ENABLE_READING_SUMMARIES=true to generate)",
      "key_cross_references": [],
      "witness_passages": [
        "ramanuja_8.17",
        "vedantadeshika_8.17"
      ],
      "score": 0.5,
      "english_rendering": "Rāmānuja reads brahmaṇaḥ as caturmukha (four-faced Brahmā) whose very day-night rhythm is constituted by the saṃkalpa (will) of Bhagavān. The phrase mat-saṃkalpa-kṛta-ahorātra-vyavasthā (the day-night arrangement made by My will) frames the verse: even cosmic time is kainkarya-space (the Lord's sovereign ordering). Knowing this temporal architecture is thus knowledge of Bhagavān's sovereignty, a step toward prapatti (surrender) rather than mere calendrical scholarship."
    },
    "dvaita": {
      "reading_summary": "(reading summary extraction pending; ENABLE_READING_SUMMARIES=true to generate)",
      "key_cross_references": [],
      "witness_passages": [
        "madhva_8.17",
        "jayatirtha_8.17"
      ],
      "score": 0.5,
      "english_rendering": "Madhva's commentary spans 8.17–8.19 as a unit establishing why reaching the Lord means no return. The 'thousands of yugas' is aneka-vācī (the word sahasra is interpreted as 'many,' not strictly one thousand), and the night here is the Mahā-Viṣṇu's rātri — supported by śruti: sā viśva-rūpasya rajanī. The dissolution intended is dvipararādha-pralaya (the great dissolution at two parārdha-lifetimes of Brahmā). Hari's realm alone stands beyond this kāla-cakra (cycle of time); jīvas (individual souls) who reach Him never re-enter Brahmā's counted days."
    },
    "śuddhādvaita": {
      "reading_summary": "(reading summary extraction pending; ENABLE_READING_SUMMARIES=true to generate)",
      "key_cross_references": [],
      "witness_passages": [
        "vallabha_8.17"
      ],
      "score": 0.5,
      "english_rendering": "Vallabha anchors the verse in the paurāṇika vākya (Purāṇic statement): catur-yuga-sahasraṃ tu brahmaṇo dinam ucyate. Brahmā's own day is kāla-pramita (measured by time), confirming that ā-brahma-bhuvanāt (up to Brahmaloka) all creation is within Kṛṣṇa's līlā-kāla (play-time). The twice-stated yuga-sahasra — for day and night — underscores that every creative and dissolving movement is Kṛṣṇa's prasāda-withdrawal and prasāda-gift. The devotee who sees Brahmā's day as Kṛṣṇa's breath rests in svarūpa-laya (dissolution into one's own essential nature) rather than fearing pralaya."
    },
    "bhakti": {
      "reading_summary": "(reading summary extraction pending; ENABLE_READING_SUMMARIES=true to generate)",
      "key_cross_references": [],
      "witness_passages": [
        "sridhara_8.17"
      ],
      "score": 0.5,
      "english_rendering": "Śrīdhara Svāmī (bhāṣya fully present) gives the richest calendrical gloss: one human year = one divine ahorātra (day-night); twelve thousand divine years = one catur-yuga; one thousand catur-yugas = Brahmā's one day. Those who know this are the true aho-rātra-vidaḥ — as opposed to those who track only candra-arka-gati (solar-lunar motion) and are alpa-darśin (of narrow vision). Maharloka and higher worlds are also encompassed by brahmaṇaḥ as an upalakṣaṇa (pointer-term). The verse grounds renunciation: even Brahmā's century is a measurable blink, so bhakti aimed at the unmeasured is the only rational investment."
    },
    "advaita-bhakti": {
      "reading_summary": "(reading summary extraction pending; ENABLE_READING_SUMMARIES=true to generate)",
      "key_cross_references": [],
      "witness_passages": [
        "madhusudan_8.17"
      ],
      "score": 0.5,
      "english_rendering": "Madhusūdana Sarasvatī reads the verse as answering 'why are even Brahmaloka's residents subject to return?' — because kāla-paricchinna-tva (time-delimitedness) is their condition. He echoes the paurāṇika vākya on catur-yuga-sahasra and adds, following Śrīdhara, that those who track only candra-arka are not true aho-rātra-vidaḥ due to svalpa-darśitva (littleness of vision). For Madhusūdana the yogin who truly knows Brahmā's day is the one whose heart is already anchored in Kṛṣṇa — the timeless witness behind all counted cycles — making jñāna and bhakti co-present in the very act of cosmic time-keeping."
    }
  },
  "prosodic_information": {
    "meter": "anuṣṭubh",
    "meter_shift_from_previous": false,
    "meter_shift_to_next": false,
    "pragmatic_context": {
      "vocative": "",
      "preceding_question": "",
      "following_response": ""
    }
  },
  "theme_list_memberships": [
    {
      "list": "ब्रह्म",
      "role": "supporting",
      "other_verses_in_list": [
        "1.1",
        "2.72",
        "3.14",
        "3.15",
        "4.21",
        "4.24",
        "4.25",
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        "5.10",
        "5.19",
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        "8.3",
        "8.11",
        "8.13",
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        "8.24",
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        "14.3",
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        "17.24",
        "18.42",
        "18.50",
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        "18.54"
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  "audit_trail": {
    "substrate_version": "v2.6-frozen",
    "fitted_weights": {
      "a": 1.0,
      "b": 0.01,
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      "z": 0.2,
      "h": 0.0,
      "th": 0.01
    },
    "corpus_provenance": {
      "mūla": "Belvalkar critical edition (BORI 1947), via Ambuda multi-witness",
      "panel_witnesses": [
        "bg-mula",
        "bg-shankara",
        "bg-ramanuja",
        "bg-madhva",
        "bg-vedantadeshika",
        "bg-vallabha",
        "bg-jayatirtha",
        "bg-anandgiri",
        "bg-sridhara",
        "bg-madhusudan"
      ]
    },
    "extraction_date": "2026-04-21",
    "score_methodology_documented_at": "Paper 1, Section II.B",
    "word_by_word_parser": "ByT5-Sanskrit-multitask (Nehrdich/Hellwig/Keutzer EMNLP 2024)",
    "post_generation_repairs": [
      {
        "date": "2026-05-03",
        "fix": "verb-lemma-misidentification (broader heuristic: prefix-√root canonical for all verb-tagged tokens)",
        "scope": "word_by_word[].lemma",
        "loci": [
          "viduḥ: vid -> √vid"
        ]
      }
    ]
  },
  "so_what_questions": [
    "If even Brahmaloka — the summit of human aspiration across lifetimes — is dissolved at the end of Brahmā's night, what soteriological goal is worth sustained effort?",
    "The verse distinguishes aho-rātra-vidaḥ (those who truly know cosmic time) from ordinary solar-lunar trackers — what kind of knowledge qualifies as 'truly knowing time,' and how is it cultivated?",
    "Madhva reads sahasra as 'many' rather than strictly one thousand — does the precision of the cosmological number matter doctrinally, or is the point the sheer incomprehensibility of the scale?",
    "If Brahmā's day and night are equal in duration (both yuga-sahasra), what is the implication for the symmetry of creation and dissolution — and does any school find asymmetry meaningful?",
    "Rāmānuja frames this as Bhagavān's saṃkalpa structuring time — does that make cosmic dissolution an act of grace, punishment, or neutral play?",
    "Śrīdhara notes that brahmaṇaḥ is an upalakṣaṇa pointing to Maharloka and beyond — how high does the verse's claim of perishability extend, and where (if anywhere) does the text say it stops?",
    "All schools agree all worlds within Brahmā's calendar are puna-rāvartī (returnable) — yet they disagree on the exit condition. What is the minimal common structure across schools for 'escaping the cycle'?"
  ],
  "everyday_applications": {
    "advaita": "When a long-term project, relationship, or institution you have built faces dissolution, treat it as a Brahmā-night arriving on its schedule — not as failure. The aho-rātra-vid (one who knows cosmic day-night) does not cling to the day because the night is guaranteed; practice non-attachment to outcomes precisely calibrated to their temporal scale.",
    "viśiṣṭādvaita": "Frame your daily schedule as operating inside Bhagavān's mat-saṃkalpa (sovereign intention): morning (creation-phase) and night (dissolution-phase) are not neutral clock-ticks but the Lord's ordered rhythm. Begin and close each day with a brief act of kainkarya — offering the day's first and last actions as service — so that even your circadian time becomes participation in cosmic ahorātra.",
    "dvaita": "When facing an ending — job loss, death of a loved one, collapse of a plan — recall dvipararādha-pralaya: Brahmā's own lifespan ends. No outcome you are protecting is more durable than Brahmā's day. Direct the energy spent on preservation toward smaraṇa (remembrance) of Hari, the one entity Madhva says stands outside all counted nights.",
    "śuddhādvaita": "Treat creative sprints and fallow periods as Kṛṣṇa's prasāda-extension and prasāda-withdrawal respectively — not as your productivity succeeding or failing. The equal length of Brahmā's day and night means neither productivity nor rest is more 'real.' Enter each pause as a mini-pralaya: let the prior form dissolve cleanly so the next sṛṣṭi (creation) can emerge from Kṛṣṇa's fresh will rather than your carried-over anxiety.",
    "bhakti": "Śrīdhara's distinction between alpa-darśin (narrow-vision) and true aho-rātra-vid maps onto intellectual humility: before dismissing a difficulty as 'taking too long,' ask whether you are tracking candra-arka time (surface deadlines) or the deeper rhythm of how understanding actually matures. Extend patience to yourself and students by calibrating expectations to the real temporal scale of the work.",
    "advaita-bhakti": "Madhusūdana's synthesis: use cosmological scale as a svalpa-darśitva (narrow-vision) detector in daily decisions. When urgency or fear contract your perspective to the next hour or quarter, consciously zoom to Brahmā's day — 4.32 billion years — then zoom back. The contrast does not produce paralysis; it produces the equanimity of the yogin who acts fully in the moment precisely because he is not over-invested in its permanence."
  },
  "primary_meaning": "A thousand yugas make Brahmā's single day; a thousand more make his night. Those who know this measure of time are the true knowers of day and night."
}