“Anyone who stops learning is old, whether at twenty or eighty. Anyone who keeps learning stays young. The greatest thing in life is to keep your mind young
“Experiences are savings which a miser puts aside. Wisdom is an inheritance which a wastrel cannot exhaust
“An education isn't how much you have committed to memory, or even how much you know. It's being able to differentiate between what you know and what you don't
“The simplest schoolboy is now familiar with truths for which Archimedes would have sacrificed his life.