I hope that when I die, people say about me, 'Boy, that guy sure owed me a lot of money.'
One of the keys to happiness is a bad memory.
The real problem is not whether machines think but whether men do.
My pessimism extends to the point of even suspecting the sincerity of the pessimists.
Where we have strong emotions, we're liable to fool ourselves.
Failures are finger posts on the road to achievement.
Nothing in the world can take the place of Persistence. Talent will not; nothing is more common than unsuccessful men with talent. Genius will not; unrewarded genius is almost a proverb. Education will not; the world is full of educated derelicts. Persistence and determination alone are omnipotent. The slogan 'Press On' has solved and always will solve the problems of the human race.