Experience is something you don't get until just after you need it. For every action, there is an equal and opposite criticism. He who hesitates is probably right. Never do card tricks for the group you play poker with. No one is listening until you make a mistake.
Success always occurs in private, and failure in full view.
The colder the X-ray table, the more of your body is required on it. The hardness of the butter is inversely proportional to the softness of the bread. The severity of the itch is proportional to the difficulty of the reach. You never really learn to swear until you learn to drive. A clear conscience is usually the sign of a bad memory.