Who said "Man is nothing else but what he makes of himself."?

This quote is attributed to Sartre, Jean-Paul.

Man is nothing else but what he makes of himself. - Sartre, Jean-Paul

"Man is nothing else but what he makes of himself."

Sartre, Jean-Paul Life

Philosopher-Writer French 1905–1980

"Existence precedes essence"

"We are our choices"

"Man is condemned to be free"

"Freedom is what you do with what's been done to you"

"Life is meant to be lived with passion."

"Life is what happens when you're busy making other plans."

"Life is a journey, not a destination."

"Life's too short for regrets."