The true discovery of America is before us. The true fulfillment of our spirit, of our people, of our mighty and immortal land, is yet to come.

Man is always something more than what he knows about himself. He is not what he is simply once and for all, but is a process.

人生是不断选择的过程。

The labor which it would require to make a single one of these guns by hand would exhaust the patience and perseverance of any ordinary workman.

企业的成功不在于规模大小，而在于是否能够持续创新。