The concept of purpose has no place in a scientific account of behavior.

I don't think President Bush is doing anything at all about Aids. In fact, I'm not sure he even knows how to spell Aids.

To act agreeably to our nature is virtue.

I'm not a role model, I'm just a human being.

The next generation of scientists will solve problems we can’t even imagine today.

有时我希望有人能找到我。