You have no control over what the other guy does. You only have control over what you do.
Never eat more than you can lift.
If you would thoroughly know anything, teach it to others.
A physicist is an atom's way of knowing about atoms.
You must not think me necessarily foolish because I am facetious, nor will I consider you necessarily wise because you are grave.
Nothing takes the taste out of peanut butter quite like unrequited love.
Good judgment comes from experience, and experience comes from bad judgment.