In the stock market... You can be right for the wrong reasons or wrong for the right reasons.

The Internet is the world's largest library. It's just that all the books are on the floor.

When asked why he doesn't believe in astrology, the logician Raymond Smullyan responds that he's a Gemini and Geminis never believe in astrology.

Mathematicians are a bit like the laconic Vermonter who, when asked if he's lived in the state his whole life, replies, "Not yet."

So many see themselves as aggrieved; so few see themselves as aggrievers.

I used to be surprised and even depressed when I met someone I had admired and discovered him or her to be a jerk or, perhaps worse, rather common. Now I half expect this reaction and even find it a little reassuring, maybe even uplifting. Isn't it amazing that somebody like that could produce such and such.

The once-surprising existence of non-Euclidean models of Euclid's first four axioms can be seen as a sort of mathematical joke.