Shiv

“I wasn’t destined to be an astronaut. I had to turn myself into one.”
― Chris Hadfield, An Astronaut's Guide to Life on Earth

“The first principle is that you must not fool yourself—and you are the easiest person to fool. So you have to be very careful about that. After you’ve not fooled yourself, it’s easy not to fool other scientists. You just have to be honest in a conventional way after that.”
― Richard P. Feynman, Surely You're Joking, Mr. Feynman! Adventures of a Curious Character

“Confidence is ignorance. If you're feeling cocky, it's because there's something you don't know.”
― Eoin Colfer, Artemis Fowl

“We suffer more often in imagination than in reality”
― Lucius Annaeus Seneca