देहिनोऽस्मिन्यथा देहे कौमारं यौवनं जरा। तथा देहान्तरप्राप्तिर्धीरस्तत्र न मुह्यति ॥

dehino ’smin yathā dehe kaumāraṁ yauvanaṁ jarā tathā dehāntara-prāptir dhīras tatra na muhyati

As the dweller in the body experienceth in the body childhood, youth, old age, so passeth he on to another body; the steadfast one grieveth not thereat.

In plain words: The soul living in the body goes through childhood, youth and old age. In the same way, at death it moves on to a new body, and a calm person is not upset by this.