The best moments in our lives are not the passive, receptive, relaxing times... The best moments usually occur if a person's body or mind is stretched to its limits in a voluntary effort to accomplish something difficult and worthwhile.

生活只能向后理解；但它必须向前生活。

True loneliness is not being alone, but feeling lonely in a crowd.

每个文明都是建立在另一个文明的骸骨之上。