Tycho Brahe, another astronomer, kept an idiot, whose disconnected and meaningless words he carefully set down, and then put them together in such manner as to make prophecies, and then waited patiently to see them fulfilled. Luther believed that he had actually seen the devil, and had discussed points of theology with him. The human mind was in chains. Every idea almost was a monster. Thought was deformed. Facts were looked upon as worthless. Only the wonderful was worth preserving. Things that actually happened were not considered worth recording;--real occurrences were too common. Everybody expected the miraculous. The ghosts were supposed to be busy; devils were thought to be the most industrious things in the universe, and with these imps, every occurrence of an unusual character was in some way connected. There was no order, no serenity, no certainty, in anything. Everything depended upon ghosts and phantoms. Man was, for the most part, at the mercy of malevolent spirits. He protected himself as best he could with holy water and tapers and wafers and cathedrals. He made noises and rung bells to frighten the ghosts, and he made music to charm them. He used smoke to choke them, and incense to please them. He wore beads and crosses. He said prayers, and hired others to say them. He fasted when he was hungry, and feasted when he was not. He believed everything that seemed unreasonable, just to appease the ghosts. He humbled himself. He crawled in the dust. He shut the doors and windows, and excluded every ray of light from the temple of the soul. He debauched and polluted his own mind, and toiled night and day to repair the walls of his own prison. From the garden of his heart he plucked and trampled upon the holy flowers of pity. The priests reveled in horrible descriptions of hell. Concerning the wrath of God, they grew eloquent. They denounced man as totally depraved. They made reason blasphemy, and pity a crime. Nothing so delighted them as painting the torments and sufferings of the lost. Over the worm that never dies they grew poetic; and the second death filled them with a kind of holy delight. According to them, the smoke and cries ascending from hell were the perfume and music of heaven. At the risk of being tiresome, I have said what I have to show you the productions of the human mind, when enslaved; the effects of wide-spread ignorance--the results of fear. I want to convince you that every form of slavery is a viper, that, sooner or later, will strike its poison fangs into the bosoms of men. The first great step towards progress, is, for man to cease to be the slave of man; the second, to cease to be the slave of the monsters of his own creation--of the ghosts and phantoms of the air. For ages the human race was imprisoned. Through the bars and grates came a few struggling rays of light. Against these grates and bars Science pressed its pale and thoughtful face, wooed by the holy dawn of human advancement.