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The true measure of leadership is how well you empower others to achieve their full potential.

The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.

"We are all the sum of our hesitations."

You are never too old to set another goal or to dream a new dream.

Experience is simply the name we give our mistakes.

數學家的模式，就像畫家或詩人的模式一樣，必須是美麗的；思想，就像顏色或文字一樣，必須以和諧的方式結合在一起。