For thousands of years people have been trying to force other people to think their way. Did they succeed? No. Will they succeed? No. Why? Because brute force is not an argument.

The priests of one religion never credit the miracles of another religion. Is this because priests instinctively know priests?

As long as every question is answered by the word "God," scientific inquiry is simply impossible.

Would God give a bird wings and make it a crime to fly? Would he give me brains and make it a crime to think? Any God that would damn one of his children for the expression of his honest thought wouldn't make a decent thief. When I read a book and don't believe it, I ought to say so. I will do so and take the consequences like a man.

The man who finds a truth lights a torch.

Commerce is the great civilizer.

There are treasures in books that all the money in the world cannot buy, but the poorest laborer can have for nothing.