Who said "In his heart a man must accept the logic of his existence."?

This quote is attributed to John Steinbeck.

In his heart a man must accept the logic of his existence. - John Steinbeck

"In his heart a man must accept the logic of his existence."

John Steinbeck Philosophy

Novelist American 1902–1968

"The person who says it cannot be done should not interrupt the person doing it."

"All war is a symptom of man's failure as a thinking animal."

"Ideas are like rabbits. You get a couple and learn how to handle them, and pretty soon you have a dozen."

"The comfortable people want only waking and sleeping, eating and excreting, working and reproducing."

"I've seen the worst humanity has to offer."

"Sometimes I wonder if the world is worth saving."

"Every choice shapes our destiny."

"Order is the foundation of a good life."