देहिनोऽस्मिन्यथा देहे कौमारं यौवनं जरा।
तथा देहान्तरप्राप्तिर्धीरस्तत्र न मुह्यति।।2.13।।
2.13. Just as the boyhood, youth and old age come to the embodied Soul in this body, in the same manner is the attaining of another body; the wise man is not deluded at that.
2.12-13 Na hi etc. Dehinah etc Never indeed did I not exist, but I did exist [always]. Likewise are you and these kings. If there can be lamentability for one, on attaining change in physical form then why is one not lamented over when one attains the youth from the boyhood ? He, who is wise, does not lament. But, wisdom is easily attainable for him whose concern is not even for this [present] body. Therefore you must seek wisdom.
Dehino’smin yathaa dehe kaumaaram yauvanam jaraa; Tathaa dehaantara praaptir dheeras tatra na muhyati.
dehinaḥ—of the embodied; asmin—in this; yathā—as; dehe—in the body; kaumāram—childhood; yauvanam—youth; jarā—old age; tathā—similarly; deha-antara—another body; prāptiḥ—achieves; dhīraḥ—the wise; tatra—thereupon; na muhyati—are not deluded