Psychology must be a purely descriptive science.

The will of the people, moreover, practically means the will of the most numerous or the most active part of the people; the majority, or those who succeed in making themselves accepted as the majority; the people, consequently may desire to oppress a part of their number; and precautions are as much needed against this as against any other abuse of power. The limitation, therefore, of the power of government over individuals loses none of its importance when the holders of power are regularly accountable to the community, that is, to the strongest party therein

——赠汝为同志题词

Mathematics is the art of turning complexity into clarity.

Literature is the bridge between the seen and the unseen worlds.

The study of automata and formal languages is fundamental to understanding the limits of computation.