Many people find the universe confusing - it's not.

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

We are all different. There is no such thing as a standard or run-of-the-mill human being, but we share the same human spirit.

If any one of about 40 physical qualities had more than slightly different values, life as we know it could not exist.

Religion believes in miracles, but these aren't compatible with science.

We are entering an increasingly dangerous period of our history. But I'm an optimist.