If your head tells you one thing, and your heart tells you another, before you do anything, you should first decide whether you have a better head or a better heart.

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

Geometry is beautifully logical, and it teaches you how to think and prove that things are so, step by step by step. Proofs are excellent lessons in reasoning. Without logic and reasoning, you are dependent on jumping to conclusions or - worse - having empty opinions.

An ounce of sequins can be worth a pound of home cooking.

If you're wondering if you're dreaming, you're dreaming.

You can't be wise without being intelligent, but you certainly can be intelligent without being wise.

An error becomes a mistake when we refuse to admit it.