"The only source of knowledge is experience."

— Albert Einstein

"Imagination is more important than knowledge. Knowledge is limited. Imagination encircles the world."

— Albert Einstein

"To be ignorant of one's ignorance is the malady of the ignorant."

— A.B. Alcott

"If you think education is expensive, try ignorance."

— Derek Bok

"There are things known and there are things unknown, and in between are the doors of perception."

— Aldous Huxley

"To acquire knowledge, one must study; but to acquire wisdom, one must observe."

— Marilyn vos Savant

"The only true wisdom is in knowing you know nothing."

— Socrates

"A man is but what he knows."

— Francis Bacon

"Learning never exhausts the mind."

— Leonardo da Vinci

"A room without books is like a body without a soul."

— Marcus Tullius Cicero

"Knowledge speaks, but wisdom listens."

— Jimi Hendrix

"The beautiful thing about learning is that no one can take it away from you."

— B.B. King