Try not to become a man of success but rather to become a man of value.

If we knew what it was we were doing, it would not be called research, would it?

Put your hand on a hot stove for a minute, and it seems like an hour. Sit with a pretty girl for an hour, and it seems like a minute. THAT'S relativity.

Teaching should be such that what is offered is perceived as a valuable gift and not as a hard duty.

Do not worry about your problems with mathematics, I assure you mine are far greater.
— Albert Einstein

All men who have turned out worth anything have had the chief hand in their own education.
— Sir Walter Scott

HT: Mental Multivitamin