Jesus loves you, but everyone else thinks you're an ass.

We only have to look at ourselves to see how intelligent life might develop into something we wouldn't want to meet.

Time travel used to be thought of as just science fiction, but Einstein's general theory of relativity allows for the possibility that we could warp space-time so much that you could go off in a rocket and return before you set out.

Some people would claim that things like love, joy and beauty belong to a different category from science and can't be described in scientific terms, but I think they can now be explained by the theory of evolution.

So remember to look up at the stars and not down at your feet. Try to make sense of what you see and hold on to that childlike wonder about what makes the universe exist.

The fact that no one understands you doesn't mean you're an artist.

The wise never marry, and when they marry they become otherwise.