Quote by Richard Feynman

"The first principle is that you must not fool yourself, and you are the easiest person to fool."

"What I cannot create, I do not understand."

"The pleasure of finding things out is the most important thing."

"You don't have to know everything to do something."

"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."