世界上充满了显而易见的事情，却没人注意到。

Mathematics is not just about numbers, equations, computations, or algorithms: it is about understanding.

写作是一种不被中断的说话方式。

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.