The only way of discovering the limits of the possible is to venture a little way past them into the impossible.
We cannot be sure of having something to live for unless we are willing to die for it.
我们都在阴沟里,但仍有人仰望星空。
在化学中,最小的变化可能引发最大的革命。
The farmer is the only man in our economy who buys everything at retail, sells everything at wholesale, and pays the freight both ways.