The purpose of life is not to be happy. It is to be useful, to be honorable, to be compassionate, to have it make some difference that you have lived and lived well.

A great leader takes people where they don't necessarily want to go, but ought to be.

《中庸》开篇指出人性源于天命的赋予

亲代投资是理解两性交配策略差异的关键。