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 do… - Robert Green Ingersoll

Robert Ingersoll was humorist, iconoclast and lover of humanity. It is said that the difference between man and the lower animals is that man has the ability to laugh. When you laugh you relax, and when you relax you give freedom to muscles, nerves and brain-cells. Man seldom has use of his reason when his brain is tense. The sense of humor makes a condition where reason can act. Ingersoll knew that he must make his appeal to man's brain.

And yet, I admit that the most infamous popes, the most heartless and fiendish bishops, friars, and priests were models of mercy, charity, and justice when compared with the orthodox God—with the God they worshiped. These popes, these bishops, these priests could persecute only for a few years—they could burn only for a few moments—but their God threatened to imprison and burn forever; and their God is as much worse than they were, as hell is worse than the Inquisition.

Christian chronology gives the age of the first man, and then gives the line from father to son down to the flood, and from the flood down to the coming of Christ, showing that men have been upon the earth only about six thousand years. This chronology is infinitely absurd, and I do not believe that there is an intelligent, well-educated Christian in the world, having examined the subject, who will say that the Christian chronology is correct.