The main answer is that the pursuit of identity runs against the very grain of existence. To fight it is to doom yourself to endless frustration, and, in fact, to turn your life into a sort of living death.

This is why purpose is really more accurately described as your purposes. Different things are going to be important to you at different moments. Embrace this. Your focus and purpose should change as you evolve, find new things you’re curious about, and enjoy a life well-lived.