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The selfish gene theory is not a theory about selfishness in the everyday sense. It is a theory about the evolution of behavior.

The strength of a nation lies in the unity of its people.

Mathematics is the language with which God has written the universe.

心神應該保持平靜穩定，骨力應該保持活動鍛煉，胸懷應該保持寬廣豁達，筋骨應該保持堅強硬朗，脊梁應該保持端正平直，腸胃應該保持素淡潔凈，舌端應該保持謹慎寡言，腳跟應該保持堅定不移，耳目應該保持聰明朗潔，精神應該保持正直無邪。