预测未来的最好方法就是创造未来。

The desires， and other passions of man， in themselves， are in his own power； his real difficulties are， to know when they are to be controlled， and when not.

唱歌的人不求声音高尖而求合乎节拍，评论者不追求华丽的辞藻而注重所谈论的事情符合实际。