盖亚的概念不是一个需要验证的假设，而是一种组织事实的方式。

No arts; no letters; no society; and which is worst of all, continual fear, and danger of violent death; and the life of man, solitary, poor, nasty, brutish, and short.

True leadership means making tough decisions today that will benefit future generations.

采矿中的每一个挑战都是创新的机会。