Of course there is a lot of that goes on in the world. You could say that about any number of things. Unbelief gets to atheism, and there are people everywhere who hold, say, to the theory of evolution with tremendous tenacity, and it doesn't bother them that it's a theory, and that immense parts of it are implausible and cannot be proven and are even unscientific. It becomes an invention of the heart. They are committed to it and they believe it is absolute truth, and any alternative is a complete abdication of brains and intelligence, and is absurd. They’ve come to believe in it with all their hearts.
It is true of a number of things. It can be true of us. You dislike like somebody. What have they done? It may be a small thing, but if you don't deal with that dislike, it grows. As time goes on you dislike them from the heart. As soon as the name is mentioned you think, ‘Oh, I dislike that person.’ It was perhaps a mannerism that you objected to at first. What is there to dislike in that? A mannerism. What evil is that? And yet it grew and it grew, because it wasn't dealt with. That is an unworthy thing to think. So something can become a conviction of the heart.