The only time I have problems is when I sleep.

Sleep is like a drug. Take too much at a time and it makes you dopey. You lose time and opportunities.

I prioritize sleep unless I'm traveling in different time zones. Sometimes getting eight hours is impossible, but I am very focused on it, and I need eight hours. I think better. I have more energy. My mood is better.

Sleep is the best meditation.

A man on a thousand mile walk has to forget his goal and say to himself every morning, 'Today I'm going to cover twenty-five miles and then rest up and sleep.

Our greatest weakness lies in giving up. The most certain way to succeed is always to try just one more time.