The reason men oppose progress is not that they hate progress, but that they love inertia.

In a state of nature, the weakest go to the wall; in a state of over-refinement, both the weak and the strong go to the gutter.

There is no freedom on earth or in any star for those who deny freedom to others.

Luck is tenacity of purpose.

Some one has said that we are moving so fast that when plans are being made to perform some great feat, these plans are broken into by a youth who enters and says, “I have done it."

Some men succeed by what they know; some by what they do; and a few by what they are.

History: gossip well told.