Who said "Isolation is the great test of a man's humanity."?

This quote is attributed to Mark Watney.

Isolation is the great test of a man's humanity. - Mark Watney

"Isolation is the great test of a man's humanity."

Mark Watney Philosophy

Character in The Martian

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"I'm going to have to science the shit out of this (paraphrased)"

"Humans are really resilient - we adapt quickly to circumstances"

"The key to survival is solving problems one at a time"

"Humor and maintaining perspective are essential to survival"

"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."