योगवासिष्ठः yogavāsiṣṭhaḥ - book-7, chapter-164, verse-4

यच्चातत्त्वज्ञविषयं तज्जानाति स एव तत् ।
वयं तु विद्मो नाहं त्वं नातत्त्वज्ञं न वस्तु तत् ॥ ४ ॥

yaccātattvajñaviṣayaṃ tajjānāti sa eva tat ,
vayaṃ tu vidmo nāhaṃ tvaṃ nātattvajñaṃ na vastu tat 4

4. yat ca atattvajñaviṣayam tat jānāti saḥ eva tat | vayam
tu vidmaḥ na aham tvam na atattvajñam na vastu tat ||

4. yat ca atattvajñaviṣayam (asti),
saḥ eva tat jānāti vayam tu na aham na tvam na atattvajñam na tat vastu vidmaḥ

4. And that which constitutes the domain of the non-knower of truth (atattvajña), he alone perceives it. But we (who are knowers of truth) understand neither "I" nor "you," nor a non-knower of truth (atattvajña), nor any (such) existing thing (vastu) as distinct realities.

Words meanings summery:

• यत् (yat) - that which (which, whatever)

• च (ca) - and (and, also)

• अतत्त्वज्ञविषयम् (atattvajñaviṣayam) - domain of the non-knower of truth (atattvajña) (domain of the non-knower of truth)

• तत् (tat) - it (the domain) (that, it)

• जानाति (jānāti) - perceives (knows, understands, perceives)

• सः (saḥ) - he (the non-knower) (he, that one)

• एव (eva) - alone (alone, only, indeed)

• तत् (tat) - it (the domain) (that, it)

• वयम् (vayam) - we (who are knowers of truth) (we)

• तु (tu) - but, however (but, however, on the other hand)

• विद्मः (vidmaḥ) - we understand (we know, we understand)

• न (na) - neither (in a series) (not, no)

• अहम् (aham) - "I" (as a separate reality) (I, ego)

• त्वम् (tvam) - "you" (as a separate reality) (you)

• न (na) - neither (not, no)

• अतत्त्वज्ञम् (atattvajñam) - non-knower of truth (atattvajña) (as a separate reality) (non-knower of truth)

• न (na) - nor (not, no)

• वस्तु (vastu) - any (such) existing thing (as a distinct reality) (thing, object, reality)

• तत् (tat) - that (as a distinct reality) (that)

Words meanings and morphology

यत् (yat) - that which (which, whatever)

(pronoun)

Nominative, neuter, singular of yad

yad - which, what, whatever

Note: Relative pronoun.

च (ca) - and (and, also)

(indeclinable)

Note: Conjunction.

अतत्त्वज्ञविषयम् (atattvajñaviṣayam) - domain of the non-knower of truth (atattvajña) (domain of the non-knower of truth)

(noun)

Nominative, neuter, singular of atattvajñaviṣaya

atattvajñaviṣaya - domain/object of a non-knower of truth

Compound type : tatpuruṣa (atattvajña+viṣaya)

• atattvajña – non-knower of truth
  noun (masculine)
  Compound of 'a' (neg.) and 'tattvajña'
• viṣaya – object, domain, sphere
  noun (masculine)

Note: Predicate noun for `yat`.

तत् (tat) - it (the domain) (that, it)

(pronoun)

Accusative, neuter, singular of tad

tad - that, it

Note: Object of `jānāti`.

जानाति (jānāti) - perceives (knows, understands, perceives)

(verb)

3rd person , singular, active, present (lat) of jñā

Present Active

from √jñā, 3rd person singular Present active

Root: jñā (class 9)

सः (saḥ) - he (the non-knower) (he, that one)

(pronoun)

Nominative, masculine, singular of tad

tad - that, he

Note: Subject of `jānāti`. Refers to the `atattvajña`.

एव (eva) - alone (alone, only, indeed)

(indeclinable)

Note: Emphatic.

तत् (tat) - it (the domain) (that, it)

(pronoun)

Accusative, neuter, singular of tad

tad - that, it

Note: Object of `jānāti`. Repetition for emphasis or clarity.

वयम् (vayam) - we (who are knowers of truth) (we)

(pronoun)

Nominative, plural of asmad

asmad - I, we

Note: Subject of `vidmaḥ`.

तु (tu) - but, however (but, however, on the other hand)

(indeclinable)

Note: Marks a contrast.

विद्मः (vidmaḥ) - we understand (we know, we understand)

(verb)

1st person , plural, active, present (lat) of vid

Present Active

from √vid, 1st person plural Present active

Root: vid (class 2)

Note: Often takes objects in accusative.

न (na) - neither (in a series) (not, no)

(indeclinable)

Note: Part of a series of negations.

अहम् (aham) - "I" (as a separate reality) (I, ego)

(pronoun)

Nominative, singular of asmad

asmad - I, me, self

Note: Here used substantively.

त्वम् (tvam) - "you" (as a separate reality) (you)

(pronoun)

Nominative, singular of yuṣmad

yuṣmad - you (singular)

Note: Here used substantively.

न (na) - neither (not, no)

(indeclinable)

Note: Part of a series of negations.

अतत्त्वज्ञम् (atattvajñam) - non-knower of truth (atattvajña) (as a separate reality) (non-knower of truth)

(noun)

Accusative, masculine, singular of atattvajña

atattvajña - non-knower of truth/reality, ignorant person

Compound type : nañ-tatpuruṣa (a+tattvajña)

• a – not, un-
  indeclinable
  negation prefix
• tattvajña – knower of truth, knower of reality
  noun (masculine)
  from tattva + jña

Note: Here used as object of `vidmaḥ`.

न (na) - nor (not, no)

(indeclinable)

Note: Part of a series of negations.

वस्तु (vastu) - any (such) existing thing (as a distinct reality) (thing, object, reality)

(noun)

Accusative, neuter, singular of vastu

vastu - thing, substance, object, reality

Root: vas (class 1)

Note: Object of `vidmaḥ`.

तत् (tat) - that (as a distinct reality) (that)

(pronoun)

Accusative, neuter, singular of tad

tad - that, it

Note: Modifies `vastu` or serves as another object in the negation list.