Copy from one, it's plagiarism; copy from two, it's research.
When I am working on a problem I never think about beauty. I only think about how to solve the problem. But when I have finished, if the solution is not beautiful, I know it is wrong.
The years of peak mental activity are undoubtedly between the ages of four and eighteen. At four we know all the questions, at eighteen all the answers.
The man who goes alone can start today; but he who travels with another must wait till that other is ready.
Democracy does not guarantee equality of conditions - it only guarantees equality of opportunity.
I have an existential map; it has 'you are here' written all over it.
If everything seems under control, you're just not going fast enough.
The most overlooked advantage of owning a computer is that if they foul up there's no law against whacking them around a bit.
Victory goes to the player who makes the next-to-last mistake.