The footsteps of Nature are to be traced, not only in her ordinary course, but when she deviates from it in her most extravagant excursions.

成功建立在不懈努力和坚定信念的基础上。

领导力意味着做出今天艰难的决定，这将使后代受益。

心理学家必须是一个中立的观察者。