Who said "Motivation is temporary, like most friendships."?

This quote is attributed to Lutz.

Motivation is temporary, like most friendships. - Lutz

"Motivation is temporary, like most friendships."

Lutz Motivation

"I'm not a nerd. I'm scientifically gifted."

"Sometimes you just gotta do what makes you happy, even if it's weird."

"Life's too short to worry about what other people think."

"I believe in the power of science and reason."

"I believe in working hard for what you want."

"Never underestimate the power of determination."

"I don't need a reason to fight."

"The most important thing is the mission. Nothing else matters."