勇气不是没有恐惧，而是战胜恐惧。
The greatest inventions often come from seeing things differently.
世界是残酷的，我的书反映了这一点。
The most perfect education, in my opinion, is such an exercise of the understanding as is best calculated to strengthen the body and form the heart.
过去从未消逝，它甚至还未过去。