The best way to predict the future is to create it.

The greatest obstacle to being heroic is the doubt whether one may not be going to prove one's self a fool; the truest heroism is to resist the doubt; and the profoundest wisdom, to know when it ought to be resisted, and when it be obeyed.

阈限性是两个阶段之间的过渡状态，个体不再处于前一个状态，但尚未进入下一个状态。

世界是心灵的镜子。

可持续性不是一种选择，而是煤炭行业的必需品。

数据是非常愚蠢的；它们不会告诉你任何关于因果关系的信息。