Every science has been an outcast.
All the altars and all the thrones united to arrest the forward march of the human race. The king said that mankind must not work for themselves. The priest said that mankind must not think for themselves. One forged chains for the hands, the other for the soul. Under this infamous regime the eagle of the human intellect was for ages a slimy serpent of hypocrisy.
The human race was imprisoned. Through some of the prison bars came a few struggling rays of light. Against these bars Science pressed its pale and thoughtful face, wooed by the holy dawn of human advancement. Bar after bar was broken away. A few grand men escaped and devoted their lives to the liberation of their fellows.
Only a few years ago there was a great awakening of the human mind. Men began to inquire by what right a crowned robber made them work for him? The man who asked this question was called a traitor. Others asked by what right does a robed hypocrite rule my thought? Such men were called infidels. The priest said, and the king said, where is this spirit of investigation to stop? They said then and they say now, that it is dangerous for man to be free. I deny it. Out on the intellectual sea there is room enough for every sail. In the intellectual air there is space enough for every wing.
The man who does not do his own thinking is a slave, and is a traitor to himself and to his fellow-men.
"Every man should stand under the blue and stars, under the infinite flag of nature, the peer of every other man."
Standing in the presence of the Unknown, all have the same right to think, and all are equally interested in the great questions of origin and destiny. All I claim, all I plead for, is liberty thought and expression. That is all. I do not pretend to tell what is absolutely true, but what I think is true. I do not pretend to tell all the truth. I do not claim that I have floated level with the heights of thought, or that I have descended to the very depths of things. I simply claim that what ideas I have, I have a right to express; and that any man who denies that right to me is an intellectual thief and robber. That is all.
Take those chains from the human soul. Break those fetters. If I have no right to think, why have I a brain? If I have no such right, have three or four men, or any number, who may get together, and sign a creed, and build a house, and put a steeple upon it, and a bell in it—have they the right to think? The good men, the good women are tired of the whip and lash in the realm of thought. They remember the chain and fagot with a shudder. They are free, and they give liberty to others. Whoever claims any right that he is unwilling to accord to his fellow-men is dishonest and infamous.
In the good old times, our fathers had the idea that they could make people believe to suit them. Our ancestors, in the ages that are gone, really believed that by force you could convince a man. You cannot change the conclusion of the brain by torture; nor by social ostracism. But I will tell you what you can do by these, and what you have done. You can make hypocrites by the million. You can make a man say that he has changed his mind; but he remains of the same opinion still. Put fetters all over him; crush his feet in iron boots; stretch him to the last gasp upon the holy rack; burn him, if you please, but his ashes will be of the same opinion still.
Our fathers in the good old times—and the best thing I can say about them is, that they have passed away—had an idea that they could force men to think their way. That idea is still prevalent in many parts, even of this country. Even in our day some extremely religious people say, "We will not trade with that man; we will not vote for him; we will not hire him if he is a lawyer; we will die before we will take his medicine if he is a doctor; we will not invite him to dinner; we will socially ostracise him; he must come to our church; he must believe our doctrines; he must worship our god or we will not in any way contribute to his support."