The first part of his idea is this:

Christianity anticipated the eccentricities and paradoxes in life and accounted for them, striking a balance between what seemed to be competing ideas, not by diluting them but by allowing them to range free and rage against each other, yet in harmony.

He gives the example of the virtue of charity:

Stated baldly, charity certainly means one of two things—pardoning unpardonable acts, or loving unlovable people. [...] A sensible pagan would say that there were some people one could forgive, and some one couldn’t: a slave who stole wine could be laughed at; a slave who betrayed his benefactor could be killed, and cursed even after he was killed. In so far as the act was pardonable, the man was pardonable. That again is rational, and even refreshing; but it is a dilution. It leaves no place for a pure horror of injustice, such as that which is a great beauty in the innocent. And it leaves no place for a mere tenderness for men as men, such as is the whole fascination of the charitable. Christianity came in here as before. It came in startlingly with a sword, and clove one thing from another. It divided the crime from the criminal. The criminal we must forgive unto seventy times seven. The crime we must not forgive at all. It was not enough that slaves who stole wine inspired partly anger and partly kindness. We must be much more angry with theft than before, and yet much kinder to thieves than before. There was room for wrath and love to run wild. And the more I considered Christianity, the more I found that while it had established a rule and order, the chief aim of that order was to give room for good things to run wild.

Do you follow his thinking? No longer is there this Aristotelian idea of virtues where the happy medium of courage is met by straddling a fence between the two extremes of cowardice and brashness. In its place was “conflict: the collision of two passions apparently opposite.” In the case of courage, “a strong desire to live taking the form of a readiness to die.”

The second part of the idea then follows:

This holy balance was not only contained in just virtues, or just in the one person, but ranged through Christendom, allowing groups and even nations to balance with each other.

We see this in the next quote:

This was the big fact about Christian ethics; the discovery of the new balance. Paganism had been like a pillar of marble, upright because proportioned with symmetry. Christianity was like a huge and ragged and romantic rock, which, though it sways on its pedestal at a touch, yet, because its exaggerated excrescences exactly balance each other, is enthroned there for a thousand years. In a Gothic cathedral the columns were all different, but they were all necessary. Every support seemed an accidental and fantastic support; every buttress was a flying buttress. So in Christendom apparent accidents balanced. Becket wore a hair shirt under his gold and crimson, and there is much to be said for the combination; for Becket got the benefit of the hair shirt while the people in the street got the benefit of the crimson and gold. It is at least better than the manner of the modern millionaire, who has the black and the drab outwardly for others, and the gold next his heart. But the balance was not always in one man’s body as in Becket’s; the balance was often distributed over the whole body of Christendom. Because a man prayed and fasted on the Northern snows, flowers could be flung at his festival in the Southern cities; and because fanatics drank water on the sands of Syria, men could still drink cider in the orchards of England. This is what makes Christendom at once so much more perplexing and so much more interesting than the Pagan empire; just as Amiens Cathedral is not better but more interesting than the Parthenon. If any one wants a modern proof of all this, let him consider the curious fact that, under Christianity, Europe (while remaining a unity) has broken up into individual nations. Patriotism is a perfect example of this deliberate balancing of one emphasis against another emphasis. The instinct of the Pagan empire would have said, “You shall all be Roman citizens, and grow alike; let the German grow less slow and reverent; the Frenchmen less experimental and swift.” But the instinct of Christian Europe says, “Let the German remain slow and reverent, that the Frenchman may the more safely be swift and experimental. We will make an equipoise out of these excesses. The absurdity called Germany shall correct the insanity called France.” [em. mine]

Chesterton then moves on to the salient point for us today: the vagaries and variances in Christianity that led to its splintering into movements and groups and subgroups is not because the Church made mountains out of molehills and went to war over the most trifling of ideas, but because a mere trifle can tip the scales when you’re balancing:

Last and most important, it is exactly this which explains what is so inexplicable to all the modern critics of the history of Christianity. I mean the monstrous wars about small points of theology, the earthquakes of emotion about a gesture or a word. It was only a matter of an inch; but an inch is everything when you are balancing. The Church could not afford to swerve a hair’s breadth on some things if she was to continue her great and daring experiment of the irregular equilibrium. Once let one idea become less powerful and some other idea would become too powerful. It was no flock of sheep the Christian shepherd was leading, but a herd of bulls and tigers, of terrible ideals and devouring doctrines, each one of them strong enough to turn to a false religion and lay waste the world. Remember that the Church went in specifically for dangerous ideas; she was a lion tamer. The idea of birth through a Holy Spirit, of the death of a divine being, of the forgiveness of sins, or the fulfilment of prophecies, are ideas which, any one can see, need but a touch to turn them into something blasphemous or ferocious. The smallest link was let drop by the artificers of the Mediterranean, and the lion of ancestral pessimism burst his chain in the forgotten forests of the north. [...] Here it is enough to notice that if some small mistake were made in doctrine, huge blunders might be made in human happiness. A sentence phrased wrong about the nature of symbolism would have broken all the best statues in Europe. A slip in the definitions might stop all the dances; might wither all the Christmas trees or break all the Easter eggs. Doctrines had to be defined within strict limits, even in order that man might enjoy general human liberties. The Church had to be careful, if only that the world might be careless.

I realize that this article is basically all quotes, but hey, it’s Chesterton. There’s not much else I can really do. The closing paragraph of this chapter is too good to not include, and caps our examination nicely:

This is the thrilling romance of Orthodoxy. People have fallen into a foolish habit of speaking of orthodoxy as something heavy, humdrum, and safe. There never was anything so perilous or so exciting as orthodoxy. It was sanity: and to be sane is more dramatic than to be mad. It was the equilibrium of a man behind madly rushing horses, seeming to stoop this way and to sway that, yet in every attitude having the grace of statuary and the accuracy of arithmetic. The Church in its early days went fierce and fast with any warhorse; yet it is utterly unhistoric to say that she merely went mad along one idea, like a vulgar fanaticism. She swerved to left and right, so exactly as to avoid enormous obstacles. She left on one hand the huge bulk of Arianism, buttressed by all the worldly powers to make Christianity too worldly. The next instant she was swerving to avoid an orientalism, which would have made it too unworldly. The orthodox Church never took the tame course or accepted the conventions; the orthodox Church was never respectable. It would have been easier to have accepted the earthly power of the Arians. It would have been easy, in the Calvinistic seventeenth century, to fall into the bottomless pit of predestination. It is easy to be a madman: it is easy to be a heretic. It is always easy to let the age have its head; the difficult thing is to keep one’s own. It is always easy to be a modernist; as it is easy to be a snob. To have fallen into any of those open traps of error and exaggeration which fashion after fashion and sect after sect set along the historic path of Christendom—that would indeed have been simple. It is always simple to fall; there are an infinity of angles at which one falls, only one at which one stands. To have fallen into any one of the fads from Gnosticism to Christian Science would indeed have been obvious and tame. But to have avoided them all has been one whirling adventure; and in my vision the heavenly chariot flies thundering through the ages, the dull heresies sprawling and prostrate, the wild truth reeling but erect. [em. mine]

If you’ve read this post but not the entire chapter we’ve been looking at, take comfort in knowing that you’ve actually just read a decent chunk of it, and it shouldn’t be much more work to read the rest. And then after that chapter is down, there’s only a few more (okay, nine) to read before you finish the book. If you find yourself discouraged with not being able to follow his argument, I encourage you to read this article by Dale Ahlquist, president of the American Chesterton Society. He same some good words for you.