"The important thing is not to stop questioning. Curiosity has its own reason for existence. One cannot help but be in awe when one contemplates the mysteries of eternity, of life, of the marvelous str…"

"The difference between stupidity and genius is that genius has its limits."

"Imagination is more important than knowledge. For knowledge is limited, whereas imagination embraces the entire world, stimulating progress, giving birth to evolution."

"I have reached an age when if someone tells me to wear socks, I don't have to."

"It is not enough to teach a man a specialty. Through it he may become a kind of useful machine but not a harmoniously developed personality."