Always keep your knife sharp, your wits sharper, and your spirit sharpest.

解释：把腹心的疾病去掉，而放在大腿胳臂上，有什么益处？

The world is full of magic things, patiently waiting for our senses to grow sharper.

建筑师必须是诗人，但必须是建造的诗人。

The only real failure in life is not to be true to the best one knows.

有时候问题很复杂，但答案却很简单。