G.K. Chesterton, Orthodoxy

[G]ranted that we have all to keep a balance, the real interest comes in with the question of how that balance can be kept. That was the problem which Paganism tried to solve: that was the problem which I think Christianity solved and solved in a very strange way.
Paganism declared that virtue was in a balance; Christianity declared it was in a conflict: the collision of two passions apparently opposite. Of course they were not really inconsistent; but they were such that it was hard to hold simultaneously. Let us . . . take the case of courage. . . . 'He that will lose his life, the same shall save it,' is not a piece of mysticism for saints and heroes. It is a piece of everyday advice for sailors or mountaineers. It might be printed in an Alpine guide or a drill book. This paradox is the whole principle of courage; even of quite earthly or quite brutal courage. A man cut off by the sea may save his life if he will risk it on the precipice. He can only get away from death by continually stepping within an inch of it. A soldier surrounded by enemies, if he is to cut his way out, needs to combine a strong desire for living with a strange carelessness about dying. He must not merely cling to life, for then he will be a coward, and will not escape. He must not merely wait for death, for then he will be a suicide, and will not escape. He must seek his life in a spirit of furious indifference to it; he must desire life like water and yet drink death like wine. . . .
And now I began to find that this duplex passion was the Christian key to ethics everywhere. Everywhere the creed made a moderation out of the still crash of two impetuous emotions. Take, for instance, the matter of modesty, of the balance between mere pride and mere prostration. The average pagan, like the average agnostic, would merely say that he was content with himself, but not insolently self-satisfied, that there were many better and many worse, that his deserts were limited, but he would see that he got them. In short, he would walk with his head in the air; but not necessarily with his nose in the air. This is a manly and rational position, but . . . [b]eing a mixture of two things, it is a dilution of two things; neither is present in its full strength or contributes its full colour. . . . Thus it loses both the poetry of being proud and the poetry of being humble. Christianity sought by this same strange expedient to save both of them.
It separated the two ideas and then exaggerated them both. In one way Man was to be haughtier than he had ever been before; in another way he was to be humbler than he had ever been before. . . . Christianity got over the difficulty of combining furious opposites, by keeping them both, and keeping them both furious. The Church was positive on both points. Once can hardly think too little of one's self. One can hardly think too much of one's soul.
[Chapter VI, "The Paradoxes of Christianity."]