I am a believer in what I call "intellectual hospitality." A man comes to your door. If you are a gentleman and he appears to be a good man, you receive him with a smile. You ask after his health. You say: "Take a chair; are you thirsty, are you hungry, will you not break bread with me?" That is what a hospitable, good man does--he does not set the dog on him. Now, how should we treat a new thought? I say that the brain should be hospitable and say to the new thought: "Come in; sit down; I want to cross-examine you; I want to find whether you are good or bad; if good, stay; if bad, I don't want to hurt you--probably you think you are all right,--but your room is better than your company, and I will take another idea in your place." Why not? Can any man have the egotism to say that he has found it all out? No. 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. There was a time in Europe when the Catholic Church had power. And I want it distinctly understood with this jury, that while I am opposed to Catholicism I am not opposed to Catholics--while I am opposed to Presbyterianism I am not opposed to Presbyterians. I do not fight people,--I fight ideas, I fight principles, and I never go into personalities. As I said, I do not hate Presbyterians, but Presbyterianism--that is, I am opposed to their doctrine. I do not hate a man that has the rheumatism--I hate the rheumatism when it has a man. So I attack certain principles because I think they are wrong, but I always want it understood that I have nothing against persons--nothing against victims.