Great minds think alike.
Everything that can be invented, has been invented.
Use what talent you possess. The woods would be very silent if no birds sang except those that sang best.
If there is anything that a man can do well, I say let him do it. Give him a chance.
Insanity: A perfectly rational adjustment to an insane world.
We do not have to visit a madhouse to find disordered minds; our planet is the mental institution of the universe.
Insane people are always sure that they are fine. It is only the sane people who are willing to admit that they are crazy.
Insanity: Doing the same thing over and over again and expecting different results.
The distance between insanity and genius is measured only by success.
Those who make peaceful revolution impossible will make violent revolution inevitable.