I always say to my students that being a scientist is like being an explorer, and I really mean that because, in a sense, I think in science we explore the world, the universe around us.

The ability to forgive is one of man's greatest achievements.

Everyone had a dirty, little secret that is never spoken out loud to anyone. Which is another way of saying people are never what they seem.

I failed, I failed, and that is about all that can be said about it.

We need to let our children grow up to face the world armed with knowledge, with much more knowledge than we ourselves had at their age. It is scary, but the alternative is worse.

Praise begets emulation,--a goodly seed to sow among youthful students.

Learn to hide your need and show your skill.

Poetry is the work of the bard and of the people who inspire him.

The real joy in life comes from giving. It comes from service. It comes from doing things for other people. That is what is so powerful about this. Nothing will make you happier than giving.

A dimwit thinks nothing is funny unless it's mean.

I've seen Leonardo Da Vinci notebooks which are filled with tiny, messy scrawls written in mirror image across the page. I'd love to know how he kept all his projects going at once.