科学的历史是新知识生产的历史。

The decline of violence may be the most significant and least-appreciated development in the history of our species.

True innovation comes from a deep understanding of existing problems.

君子的学问，关键在于自身。外界的毁誉荣辱，不仅不会动摇其心志，反而会成为磨砺自己的机会。