Discontent is the first step in the progress of a man or a nation
不满是个人或民族迈向进步的第一步。
Inquiry into reality begins with the recognition of our ignorance.
The human being is the only animal that thinks about the future.
The beauty of mathematics lies in its ability to reveal the hidden structures of reality.
成为人类就是有缺陷，而有缺陷才是真实的。
数学思想的真正考验是它能否激发进一步的思考。
Psychology must be based on direct experience, not inference.