The joy of mathematics comes from the struggle to understand.

A good mystery is like a good joke—it's all in the timing.

A word after a word after a word is power.

By recording your dreams and goals on paper, you set in motion the process of becoming the person you most want to be. Put your future in good hands — your own.

I don’t think you can compare different eras. Every era has its own challenges and its own special things.

在所有时代，困扰人类并给他们带来最大灾难的大问题，不是世界上是否有权力，也不是权力从何而来，而是谁应该拥有它。