No matter where you are on your journey, that's exactly where you need to be. The next road is always ahead.

There is a subtle danger in a man thinking that he is "fixed" for life. It indicates that the next jolt of the wheel of progress is going to fling him off.

We know it because democracy alone has constructed an unlimited civilization capable of infinite progress in the improvement of human life.

If today were the last day of my life, Would I want to do what I'm about to do today? And whenever the answer has been "no" for too many days in a row, I know I need to change something.

For if we allow that human life is always guided by reason, we destroy the premise that life is possible at all.

The most important knowledge is that which guides the way you lead your life.