他就像一个在公园里无忧无虑漫步的人一样，好像穿着一件隐形的外套，可以屏蔽监狱里的纷扰。
The true spirit of delight, the exaltation, the sense of being more than Man, which is the touchstone of the highest excellence, is to be found in mathematics as surely as in poetry.
想法到处都是，但知识非常稀缺。