Bhagavad Gita Chapter 13 Verse 31
भगवद् गीता अध्याय 13 श्लोक 31

यदा भूतपृथग्भावमेकस्थमनुपश्यति।
तत एव च विस्तारं ब्रह्म सम्पद्यते तदा।।13.31।।



English Translation - Swami Sivananda
13.31 When a man sees the whole variety of beings as resting in the One, and spreading forth from That alone, he then becomes Brahman.


English Translation of Sanskrit Commentary By Sri Shankaracharya's
13.31 Yada, when, at the time when; anupasyati, one realizes-having reflected in accordance with the instructions of the scriptures and the teachers, one realizes as a matter of ones own direct experience that All this is but the Self (Ch. 7.25.2); that bhuta-prthak-bhavam, the state of diversity of living things; is ekastham, rooted in the One, existing in the one Self; and their vistaram, manifestation, origination; tatah, eva, is also from That-when he realizes that origination in such diverse ways as, the vital force is from the Self, hope is from the Self, memory [Smara, memory; see Sankaracaryas Comm. on Ch. 7.13.1.-Tr.] is from the Self, space is from the Self, fire is from the Self, water is from the Self, coming into being and withdrawal are owing to the Self, food is from the Self (op. cit. 7.26.1); tada, then, at that time; brahma sampadyate, one becomes identified with Brahman Itself. This is the import.
If the same Self be the Self in all the bodies, then there arises the possiblity of Its association with their defects. Hence this is said:


Transliteration Bhagavad Gita 13.31Yadaa bhootaprithagbhaavam ekastham anupashyati;
Tata eva cha vistaaram brahma sampadyate tadaa.


Word Meanings Bhagavad Gita 13.31yadā—when; bhūta—living entities; pṛithak-bhāvam—diverse variety; eka-stham—situated in the same place; anupaśhyati—see; tataḥ—thereafter; eva—indeed; cha—and; vistāram—born from; brahma—Brahman; sampadyate—(they) attain; tadā—then