No president who performs his duties faithfully and conscientiously can have any leisure.

I think it's very important to have a feedback loop， where you're constantly thinking about what you've done and how you could be doing it better.I think that's the single best piece of advice: constantly think about how you could be doing things better and questioning yourself.

The best thing about getting older is that you don't lose all the other ages you've been.

The best leaders are those who empower their teams to take ownership and drive change.

The most perfect education, in my opinion, is such an exercise of the understanding as is best calculated to strengthen the body and form the heart.

To be human is to be vulnerable.