The important thing in life is to have a great aim，and the determination to attain it.

流放不仅仅是一个地理概念。你可以在自己的祖国、自己的家里、一个房间里成为流放者。

Generally speaking， the errors in religion are dangerous； those in philosophy only ridiculous.

The most dangerous illusions are those we mistake for reality.

通往可持续性的道路充满了挑战和机遇。