Never try to pacify someone at the height of his rage.
Never underestimate the power of human stupidity.
Never volunteer for anything.
Never wrestle a pig; you both get dirty, and he likes it.
Nice guys finish last but it is lonely at the top.
No experiment is ever a complete failure; it can always be used as a bad example.
No good deed goes unpunished.
No man is lonely while eating spaghetti.
No man's credit is as good as his money.