"Gravitation is not responsible for people falling in love."
"I want to know God's thoughts; the rest are details."
"The hardest thing in the world to understand is the income tax."
"Weakness of attitude becomes weakness of character."
"The eternal mystery of the world is its comprehensibility."
"Sometimes one pays most for the things one gets for nothing."
"Science without religion is lame. Religion without science is blind."
"Anyone who has never made a mistake has never tried anything new."
"Great spirits have often encountered violent opposition from weak minds."
"The whole of science is nothing more than a refinement of everyday thinking."
"The important thing is not to stop questioning. Curiosity has its own reason for existing."
"Two things are infinite: the universe and human stupidity; and I'm not sure about the the universe."
