Who said "I love doing this. I'm not denying it."?

This quote is attributed to Mark Watney.

I love doing this. I'm not denying it. - Mark Watney

"I love doing this. I'm not denying it."

Mark Watney

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"