"Being defeated is often a temporary condition. Giving up is what makes it permanent."

"Think of a hypothesis as a card. A theory is a house made of hypotheses."

"The length of your education is less important than its breadth, and the length of your life is less important than i…"

"If your head tells you one thing and your heart tells you another, before you do anything, you should first decide wh…"

"A good idea will keep you awake during the morning, but a great idea will keep you awake during the night."

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

"A fool is someone whose pencil wears out before its eraser does."

"What women want is what men want. They want respect."

"What is the essence of America? The essence of America is finding and maintaining that perfect, delicate balance betw…"

"For all practical purposes, wheat is civilization. It produces what we euphemistically call the staff of life, a staf…"