Women in science should never doubt their ability to change the world.

The price of greatness is responsibility.

The most important single aspect of software development is to be clear about what you are trying to build.

心灵是一个过程复合体，而非实体。

The state, therefore, has not existed from all eternity. There have been societies that did without it, that had no notion of the state or state power. At a certain stage of economic development, which was necessarily bound up with the split of society into classes, the state became a necessity.