Who said "One problem at a time."?

This quote is attributed to Mark Watney.

One problem at a time. - Mark Watney

"One problem at a time."

Mark Watney

Character in The Martian

Buy "The Martian" on Amazon

"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"