I have been impressed with the urgency of doing. Knowing is not enough; we must apply. Being willing is not enough; we must do.

Let him who would be happy be virtuous.

Man is the child of customs, not the child of his ancestors.

The people who think they are crazy enough to change the world are the ones who do.

Let a man radically alter his thoughts, and he will be astonished at the transformation.

If you live to be a hundred, I want to live to be a hundred minus one day.

Success is not about seeking constant external recognition; it's about finding purpose and fulfillment in the impact you make on the lives of others.