屋顶上的天空，如此蔚蓝，如此宁静！

No man, for any considerable period, can wear one face to himself and another to the multitude, without finally getting bewildered as to which may be the true.

The only fence against the world is a thorough knowledge of it.

我不是囚徒，我是自由的灵魂。

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

可持续性不是成本，而是对我们未来的投资。

有时候是这段旅程教会了你很多关于目的地的事。