好奇心推动创新，而坚持将想法转化为突破。
我不是环境的产物，我是我的决定的产物。
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.
The rules of survival never change, whether you’re in a desert or in an arena.
The key to credible causal inference is not just the method, but how well the method fits the question at hand.