每一次旅程都隐藏着另一段旅程：未选择的路和被遗忘的角度。

International politics is a ruthless and dangerous business, and it is foolish to expect states to behave according to moral principles.

People must feel that the natural world is important and valuable and beautiful and wonderful and an amazement and a pleasure.

We must balance economic growth with environmental stewardship.

痛苦可以摧毁一个人，也可以塑造一个人。