Reminded me of this:

"In the strict sense, it is not true that one's character is unchangeable; rather, this popular tenet means only that during a man's short lifetime the motives affecting him cannot normally cut deeply enough to destroy the imprinted writing of many millennia. If a man eighty thousand years old were conceivable, his character would in fact be absolutely variable, so that out of him little by little an abundance of different individuals would develop. The brevity of human life misleads us to many an erroneous assertion about the qualities of man."

- Nietzsche, Human, All Too Human