Sometimes you can't pay it back, so you just have to pay it forward.

I’d compare college tuition to paying for a personal trainer at an athletic club. We professors play the roles of trainers, giving people access to the equipment (books, labs, our expertise) and after that, it is our job to be demanding.

We cannot change the cards we are dealt, just how we play the hand. If I don’t seem as depressed or morose as I should be, sorry to disappoint you.

The size of your audience doesn't matter. What's important is that your audience is listening.

Never lose the child-like wonder. It’s just too important. It’s what drives us. Help others.

I don't suffer from an abundance of politeness.

A good apology is like antibiotic, a bad apology is like rubbing salt in the wound.