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.

You can't change the past, but you can create the future.

In mathematics, truth is found not through consensus but through proof.

你越是积极且实际地投入，就越会感到成功。