you do what you do because that’s what the harmony of the universe requires. If I am a potter I make pots - Ram Dass

The Buddha believed in reincarnation, which means he thought that something reincarnates. The Pali literature says: “There are no real ego entities hastening through the ocean of rebirth, but merely life waves, which, according to their nature and activities, manifest themselves here as men, there as animals, and elsewhere as invisible things.” “Life waves” — that’s a nice image. In Hinduism they’re called vasanas, subtle thought-forms. Every act we do creates vasanas, life waves, based on the desires connected with the act. Those life waves go out and out. Even when we die, they continue; the physical body dies, and what remains are those subtle life waves, those mental tendencies that function like a kind of psychic DNA code to determine your next round. In Hinduism that’s called karma. Karma is basically a pattern of life waves, or desire waves, that keep going and going, life after life, until they spend themselves. When they do, there’s no more individual desire, no more separation, and therefore no more incarnation. The game is over.

If you think you're free, there's no escape possible.

Spiritual practices help us move from identifying with the ego to identifying with the soul. Old age does that for you too. It spiritualizes people naturally.