Hope is the only universal liar who never loses his reputation for veracity.

Mental slavery is mental death, and every man who has given up his intellectual freedom is the living coffin of his dead soul.

There is no necessity for going to the church and hearing the same story forever. Let the minister write what he wishes to say. Let him publish it. If it is worth buying, people will read it. It is hardly fair to get them in a church in the name of duty and there inflict upon them a sermon that under no circumstances they would read...the idea of going fifty-two days in a year to hear anybody on the same subject is absurd.

Every man who expresses an honest thought is a soldier in the army of intellectual liberty.

When a fact can be demonstrated, force is unnecessary; when it cannot be demonstrated, force is infamous.

Do not tell me that you have got to be rich! We have a false standard of greatness in the United States. We think here that a man must be great, that he must be notorious; that he must be extremely wealthy, or that his name must be upon the putrid lips of rumor. It is all a mistake. It is not necessary to be rich or to be great, or to be powerful, to be happy. The happy man is the successful man. Happiness is the legal tender of the soul.Joy is wealth.

Fear is religion, courage is science.