Birth, youth and decay are the properties of the body not of the soul – Vishnu Purana

Thus the one only God, Janardana, takes the designation of Brahma, Vishnu and Shiva, accordingly as he creates, preserves, or destroys. Vishnu as creator creates Himself; as preserver preserves Himself; as destroyer destroys Himself at the end of all beings. (Amsha 1, Chapter 2)

Birth is consequent upon the virtue and vice of pristine actions.

The more a man will create dear relations, the more deeply will be implanted the thorns of anxiety in his heart.

Birth, youth and decay are the properties of the body not of the soul.

In this ocean of the world infested with many miseries Vishnu is your only stay.
Vishnu Purana