释文：不了解事情的真相就高谈阔论，便是不明智；如果知道了而不谈，就 是不忠诚。

人生是一次性的旅行，让我们勇敢地生活，不留遗憾。

I have noticed that youngsters given to the climbing habit usually do something when they grow up.

The measure of intelligence is the ability to change.

一本好书是一个永远不会让你失望的朋友。