Who said "I can't believe this is my life now."?

This quote is attributed to Mark Watney.

I can't believe this is my life now. - Mark Watney

"I can't believe this is my life now."

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"