If you based your knowledge of the human species exclusively on adverts, you'd think that the normal condition of humanity was to be a good-looking single person between 20 and 35, with excellent muscle-definition and/or an excellent figure, and a large disposable income.
You don't have to become an investment banker as a way of demonstrating that education has worked for you. But librarians have to believe in the values of high culture. Not just high culture but middle culture, low culture, kinds of exciting eye-catching crap of all kinds. Everyone needs that.
Libraries are public treasuries. They're ways in which well-meaning societies leave the wealth of the past arranged A to Z so that anyone walking past can find it.
It's true that when Christianity is socially powerful, faith can look from the outside as if it is mainly a matter of membership, of participation in the vast synchronised swim of institutions.
Despite the best efforts of apologists like William Lane Craig, the 'evidence' for Christianity's truth is, in truth, not the kind that science will or should ever admit. We believers mean something different by the word: something that puts faith permanently in the category of irreproducible results.
Belief demands that you dispense with illusion after illusion, while contemporary common sense requires continual, fluffy pretending - pretending that might as well be systematic, it's so thoroughly incentivised by our culture.
Emotions can certainly be misleading: they can fool you into believing stuff that is definitely, demonstrably untrue. Yet emotions are also our indispensable tool for navigating, for feeling our way through, the much larger domain of stuff that isn't susceptible to proof or disproof, that isn't checkable against the physical universe.
If you're a believer, God is not a thought-experiment requiring a special sub-creation to be tried out in. He's an actual, er, actuality already, embedded in a necessary and true story about guilt, hope, and liberty. I don't want C. S. Lewis doing his resourceful best to render Him as a fabulous special effect.
For a believer, Christian faith is true to the human heart, not in the sense that any old thing we fancy believing in will become conveniently true - but because the complicated truth about our hearts, as we struggle to perceive it, tells us what we are and where we are, and consequently what we need.
The emotions that sustain religious belief are all, in fact, deeply ordinary and deeply recognisable to anybody who has ever made their way across the common ground of human experience as an adult.
Christianity is a religion of continuity and discontinuity as well. It's about what stays the same and what changes in the twinkling of an eye. Both are necessary truths, but sometimes it's important to accentuate the discontinuity, the sudden leap, the way you go up a tree, Zacchaeus, and come down a saint.
There have been low moments before, but Christianity is an incredibly adaptable organism, using different parts of its repertoire to mutate into new ecological niches, yet preserving intact its story of grace, of love improbably triumphant.
I am a fairly orthodox Christian. Every Sunday, I say and do my best to mean the whole of the Creed, which is a series of propositions. But it is still a mistake to suppose that it is assent to the propositions that makes you a believer. It is the feelings that are primary.
In a hundred years, Christianity will have mutated into something utterly unpredictable which, nevertheless, we'd recognize immediately. And same-sex marriage will be one of the fine old God-given traditions that conservatives leap to defend.