“I will not attack your doctrines nor your creeds if they accord liberty to me. If they hold thought to be dangerous - if they aver that doubt is a crime, then I attack them one and all, because they enslave the minds of men.I attack the monsters, the phantoms of imagination that have ruled the world. I attack slavery. I ask for room -- room for the human mind.”

“Any doctrine that will not bear investigation is not a fit tenant for the mind of an honest man. Any doctrine that will not bear investigation is not a fit tenant for the mind of an honest man. Any man who is afraid to have his doctrine investigated is not only a coward but a hypocrite.”

“Like the most of you, I was raised among people who knew - who were certain. They did not reason or investigate. They had no doubts. They knew that they had the truth. In their creed there was no guess — no perhaps. They had a revelation from God. They knew the beginning of things. They knew that God commenced to create one Monday morning, four thousand and four years before Christ. They knew that in the eternity — back of that morning, he had done nothing. They knew that it took him six days to make the earth — all plants, all animals, all life, and all the globes that wheel in space. They knew exactly what he did each day and when he rested. They knew the origin, the cause of evil, of all crime, of all disease and death.At the same time they knew that God created man in his own image and was perfectly satisfied with his work... They knew all about the Flood -- knew that God, with the exception of eight, drowned all his children -- the old and young -- the bowed patriarch and the dimpled babe -- the young man and the merry maiden -- the loving mother and the laughing child -- because his mercy endureth forever. They knew too, that he drowned the beasts and birds -- everything that walked or crawled or flew -- because his loving kindness is over all his works. They knew that God, for the purpose of civilizing his children, had devoured some with earthquakes, destroyed some with storms of fire, killed some with his lightnings, millions with famine, with pestilence, and sacrificed countless thousands upon the fields of war. They knew that it was necessary to believe these things and to love God. They knew that there could be no salvation except by faith, and through the atoning blood of Jesus Christ.Then I asked myself the question: Is there a supernatural power -- an arbitrary mind -- an enthroned God -- a supreme will that sways the tides and currents of the world -- to which all causes bow?I do not deny. I do not know - but I do not believe. I believe that the natural is supreme - that from the infinite chain no link can be lost or broken — that there is no supernatural power that can answer prayer - no power that worship can persuade or change — no power that cares for man.Is there a God?I do not know.Is man immortal?I do not know.One thing I do know, and that is, that neither hope, nor fear, belief, nor denial, can change the fact. It is as it is, and it will be as it must be.We can be as honest as we are ignorant. If we are, when asked what is beyond the horizon of the known, we must say that we do not know. We can tell the truth, and we can enjoy the blessed freedom that the brave have won. We can destroy the monsters of superstition, the hissing snakes of ignorance and fear. We can drive from our minds the frightful things that tear and wound with beak and fang. We can civilize our fellow-men. We can fill our lives with generous deeds, with loving words, with art and song, and all the ecstasies of love. We can flood our years with sunshine — with the divine climate of kindness, and we can drain to the last drop the golden cup of joy.”

“They knew that to put God in the constitution was to put man out. They knew that the recognition of a Deity would be seized upon by fanatics and zealots as a pretext for destroying the liberty of thought. They knew the terrible history of the church too well to place in her keeping or in the keeping of her God the sacred rights of man. They intended that all should have the right to worship or not to worship that our laws should make no distinction on account of creed. They intended to found and frame a government for man and for man alone. They wished to preserve the individuality of all to prevent the few from governing the many and the many from persecuting and destroying the few.”

“This is my doctrine: Give every other human being every right you claim for yourself.”

“My dog," he said, "just barks and plays -has all he wants to eat. He never works- has no trouble about business. In a little while he dies, and that is all. I work with all my strength. I have no time to play. I have trouble every day. In a little while I will die, and then I go to hell. I wish that I had been a dog.”

“Some Christian lawyers—some eminent and stupid judges—have said and still say, that the Ten Commandments are the foundation of all law.Nothing could be more absurd. Long before these commandments were given there were codes of laws in India and Egypt—laws against murder, perjury, larceny, adultery and fraud. Such laws are as old as human society; as old as the love of life; as old as industry; as the idea of prosperity; as old as human love.All of the Ten Commandments that are good were old; all that were new are foolish. If Jehovah had been civilized he would have left out the commandment about keeping the Sabbath, and in its place would have said: 'Thou shalt not enslave thy fellow-men.' He would have omitted the one about swearing, and said: 'The man shall have but one wife, and the woman but one husband.' He would have left out the one about graven images, and in its stead would have said: 'Thou shalt not wage wars of extermination, and thou shalt not unsheathe the sword except in self-defence.'If Jehovah had been civilized, how much grander the Ten Commandments would have been.All that we call progress—the enfranchisement of man, of labor, the substitution of imprisonment for death, of fine for imprisonment, the destruction of polygamy, the establishing of free speech, of the rights of conscience; in short, all that has tended to the development and civilization of man; all the results of investigation, observation, experience and free thought; all that man has accomplished for the benefit of man since the close of the Dark Ages—has been done in spite of the Old Testament.”