The effective thinker treats arrogance as the major sin of thinking.

It's always amazed me how little attention philosophers, psychologists, or anyone else actually has paid to humor.

One very important aspect of motivation is the willingness to stop and to look at things that no one else has bothered to look at. This simple process of focusing on things that are normally taken for granted is a powerful source of creativity.

Don't criticise a hypothesis, come up with a better one.

America is an idea, but it's an idea that brings with it some baggage, like power brings responsibility. It's an idea that brings with it equality, but equality even though it's the highest calling, is the hardest to reach. The idea that anything is possible, that's one of the reasons why I'm a fan of America. It's like hey, look there's the moon up there, let's take a walk on it, bring back a piece of it. That's the kind of America that I'm a fan of.

I know it aches, how your heart it breaks. You can only take so much. Walk on.

Child mortality since 2000 is down by 2.65 million a year. That's a rate of 7,256 children's lives saved each day. ... It drives me nuts that most people don't seem to know this news.