"Some Mistakes of Moses" (1879) http://www.archive.org/stream/somemistakesmose00ingeuoft/somemistakesmose00ingeuoft_djvu.txt Section II, "Free Schools".

“For hundreds of years it was contended by all Christians that the earth was made in six days, literal days of twenty-four hours each, and that on the seventh day the Lord rested from his labor. Geologists have driven the church from this position, and it is now claimed that the days mentioned in the Bible are periods of time. This is a simple evasion, not in any way supported by the Scriptures. The Bible distinctly and clearly says that the world was created in six days. There is not within its lids a clearer statement.”

Robert G. Ingersoll

My Reviewers Reviewed (lecture from June 27, 1877, San Francisco, CA)

“Let us be honest. Did all the priests of Rome increase the mental wealth of man as much as Bruno? Did all the priests of France do as great a work for the civilization of the world as Diderot and Voltaire? Did all the ministers of Scotland add as much to the sum of human knowledge as David Hume? Have all the clergymen, monks, friars, ministers, priests, bishops, cardinals and popes, from the day of Pentecost to the last election, done as much for human liberty as Thomas Paine?”

Robert G. Ingersoll

as much for science as Charles Darwin?
The Great Infidels (1881)

“They say that the eternal future of man depends upon his belief. I deny it. A conclusion honestly arrived at by the brain cannot possibly be a crime; and the man who says it is, does not think so. The god who punishes it as a crime is simply an infamous tyrant. As for me, I would a thousand times rather go to perdition and suffer its torments with the brave, grand thinkers of the world, than go to heaven and keep the company of a god who would damn his children for an honest belief.”

Robert G. Ingersoll

My Reviewers Reviewed (lecture from June 27, 1877, San Francisco, CA)

“To compel man to desert the standard of Reason, the church does not entirely rely on the threat of eternal pain to be endured in another world, but holds out the reward of everlasting joy. To those who believe, it promises the endless ecstasies of heaven. If it cannot frighten, it will bribe”

Robert G. Ingersoll

The Truth (1896)

“Every man who has thought, knows not only how little he knows, but how little every other human being knows, and how ignorant, after all, the world must be.”

Robert G. Ingersoll

The trial of Charles B. Reynolds for blasphemy (1887)

“It is incredible that only idiots are absolutely sure of salvation. It is incredible that the more brain you have the less your chance is. There can be no danger in honest thought, and if the world ever advances beyond what it is to-day, it must be led by men who express their real opinions.”

Robert G. Ingersoll

The Great Infidels (1881)

“If there is one subject in this world worthy of being discussed, worthy of being understood, it is the question of intellectual liberty. Without that, we are simply painted clay; without that, we are poor, miserable serfs and slaves.”

Robert G. Ingersoll

The trial of Charles B. Reynolds for blasphemy (1887)

“The church has had the field for eighteen hundred years. For most of this time it has held the sword and purse of the world. For many centuries it controlled colleges and universities and schools. It had within its gift wealth and honor. It held the keys, so far as this world is concerned, of heaven and hell—that is to say, of prosperity and misfortune. It pursued its enemies even to the grave. It reddened the scaffold with the best blood, and kept the sword of persecution wet for many centuries. Thousands and thousands have died in its dungeons. Millions of reputations have been blasted by its slanders. It has made millions of widows and orphans, and it has not only ruled this world, but it has pretended to hold the keys of eternity, and under this pretence (sic) it has sentenced countless millions to eternal flames.”

Robert G. Ingersoll

A Christmas Sermon (1890)

“According to the Bible, the apostles were ordered to go into all the world and preach the gospel—yet not one of them, nor one of their converts at any time, nor one of the vicars of God, for fifteen hundred years afterward, knew of the existence of the Western Hemisphere.”

Robert G. Ingersoll

Rome, or Reason? A Reply to Cardinal Manning. Part I. The North American Review (1888)

“There may have been sometime in the history of the world a worse religion than Old School Presbyterianism, but if there ever was, from cannibalism to civilization, I have never heard of it.”

Robert G. Ingersoll

My Reviewers Reviewed (lecture from June 27, 1877, San Francisco, CA)