"The harm which is done by credulity in a man is not confined to the fostering of a credulous character in others, and consequent support of false beliefs. Habitual want of care about what I believe leads to habitual want of care in others about the truth of what is told to me. Men speak the truth to one another when each reveres the truth in his own mind and in the other's mind; but how shall my friend revere the truth in my mind when I myself am careless about it, when I believe things because I want to believe them, and because they are comforting and pleasant? Will he not learn to cry, 'Peace,' to me, when there is no peace? By such a course I shall surround myself with a thick atmosphere of falsehood and fraud, and in that I must live. It may matter little to me, in my cloud-castle of sweet illusions and darling lies; but it matters much to Man that I have made my neighbors ready to deceive. The credulous man is father to the liar....
"We all suffer severely enough from the maintenance and support of false beliefs and the fatally wrong actions which they lead to; and the evil born when one such belief is entertained is great and wide. But a greater and wider evil arises when the _credulous character_ is maintained and supported, when a habit of believing for unworthy reasons is fostered and made permanent....
"The fact that believers have found joy and peace in believing gives us the right to say that the doctrine is a comfortable doctrine, and pleasant to the soul; but it does not give us the right to say that it is true....
"And the question which our conscience is always asking about that which we are tempted to believe is not, 'Is it comfortable and pleasant?' but, 'Is it true?'"
The sooner moral actions and the necessity of clean, helpful, and charitable living are put upon a basis more solid and permanent than theology the better will it be for civilization; and if this chapter shall, by its light style, attract the attention of those who are too busy, or are disinclined for any reason whatsoever, to collect from more profound works the facts here given, I shall be satisfied with the result, because I shall have done something toward the triumph of fact over fiction.