I have always considered that the true test of a machine is its practical utility in the hands of the common laborer.

Don't stop when you're tired. Stop when you're done.

如果你想拥有从未有过的东西，就必须愿意做从未做过的事。

有技巧的人劳累，聪明的人忧虑，没有本事的人没有追求。

能源的未来是多样化的，没有任何单一来源会占主导地位。

"Experience is simply the name we give our mistakes."