Quote by Jean d'Alembert

"Doubt is an uncomfortable condition, but certainty is a ridiculous one."

"The greatest mathematicians, like the greatest poets, are men of imagination."

"I believe in God, but I do not believe that God has any of the properties which theologians ascribe to him."

"The true method of knowledge is experiment."

"Never let fear stop you from chasing your dreams."

"Courage is being afraid but doing it anyway."

"Sometimes you gotta do what you gotta do."

"Sometimes you have to be the monster to stop the monsters."