There are those who scoff at the schoolboy, calling him frivolous and shallow: Yet it was the schoolboy who said “Faith is believing what you know ain’t so.”
—Pudd’nhead Wilson’s New Calendar
“Believing what you know ain’t so” — if it is true that we choose our beliefs and are morally responsible for them, then it ought to be possible to do just that.
We are certainly morally responsible for our actions because, knowing (or thinking that we know) what is right, we are nevertheless capable of choosing to do otherwise. We are able to do what we know is wrong — to judge a particular course of action to be wrong and to do it anyway. This is possible because judging a deed to be right is one thing, and actually doing it is another. Without this distinction, the idea of sin would be incoherent.
When it comes to belief, though, no such distinction is possible. To judge a belief to be right just is to believe it. “Believing what you know ain’t so” is, pace the schoolboy, meaningless. To believe something just is to think it is so; if you don’t think it’s so, you don’t believe it. Thus, the idea of sin is incoherent when applied to beliefs. We cannot be held morally responsible for our beliefs because there is no internal standard against which to judge them. Of course, there is the external standard of what is objectively true, but that’s not good enough. A man may do something which, as a matter of fact, is wrong — but if he doesn’t know it’s wrong, he is still innocent. Likewise, a man who believes something false is innocent unless he knows it’s false — but if he knew it was false, he would eo ipso not believe it.
And yet, and yet — that can’t be the whole story. At some level, everyone understands exactly what Twain’s schoolboy is talking about, which is why his definition of faith makes us smile knowingly rather than scratching out heads. “Believing what you know ain’t so” is not simply meaningless, or it would not even register as a witticism. Somehow, despite the contradictions it seems to involve, it is possible to willfully — culpably — believe something you know is false. As for what exactly that means, though, I confess that I’m still at a loss. Further research is, as they say, indicated.