The Great Sin

Pride gets no pleasure out of having something, only out of having more of it than the next man. We say that people are proud of being rich, or clever, or good-looking, but they are not. They are proud of being richer, or cleverer, or better-looking than others.

Nearly all those evils in the world which people put down to greed or selfishness are really far more the result of Pride.

Other vices may sometimes bring people together: you may find good fellowship and jokes and friendliness among drunken people or unchaste people. But pride always means enmity - it is enmity. And not only enmity between man and man, but enmity to God.

In God you come up against something which is in every respect immeasurably superior to yourself. Unless you know God as that - and, therefore, know yourself as nothing in comparison - you do not know God at all. As long as you are proud you cannot know God. A proud man is always looking down on things and people: and, of course, as long as you are looking down, you cannot see something that is above you.

That raises a terrible question. How is it that people who are quite obviously eaten up with Pride can say they believe in God and appear to themselves very religious? I am afraid it means they are worshiping an imaginary God. They theoretically admit themselves to be nothing in the presence of this phantom God, but are really all the time imagining how He approves of them and think them far better than ordinary people...

Mere Christianity, C.S. Lewis pp.122-124