The true cost of coal isn't just in its price, but in how we manage its consequences.

The Worldly Hope men set their Hearts upon Turns Ashes—or it prospers; and anon, Like Snow upon the Desert's dusty Face, Lighting a little hour or two—is gone.

Some books are to be tasted， others to be swallowed， and some few to be chewed and digested.

每天都要努力变得比起床时聪明一点。忠实而出色地履行职责。你会有条不紊地出人头地，但不一定会一蹴而就......最后，如果你活得足够长，大多数人都会得到他们应得的。

机械感觉系统是大自然的工程杰作。