Reintegrating the brain into the rest of the body is absolutely essential to having the kind of long-term health and substantially lower cost [of care] than if you're going to treat them separately.

Established systems are inherently hostile to change.

By the end of my second term, we will have the first permanent base on the moon, and it will be American.

Change is healthy and useful. It has to be fought for most of the time. It's not inevitable. It takes real leadership and real effort. But I think it's really important not to take yourself too seriously. Dwight Eisenhower used to have a rule that you should always take your job seriously but not yourself.

We do agree that our country must take action to address climate change.

My fine friends who are perfectionists, each in their own world where they are petty dictators, could write a perfect bill. Those of us who have grown up and matured...understand that we have to work together on the big issues.

I think Donald Trump thinks of Putin as being a strong person, and I think he thinks of himself as being a very strong person. But I don't think in any way that he thinks of the Putin government as a desirable model.