“The unexamined life is not worth living.”

“Count your age by friends, not years. Count your life by smiles, not tears.”

“It is the mark of an educated mind to be able to entertain a thought without accepting it.”

“In a good bookroom you feel in some mysterious way that you are absorbing the wisdom contained in all the books through your skin, without even opening them.”

“The secret of life, though, is to fall seven times and to get up eight times.”