G.K. Chesterton has an interesting discussion of courage which relates to a lot of what I have been dicussing lately: hope and sacrifice especially, but also what it means to find balance:
All sane men can see that sanity is some kind of equilibrium; that one may be mad and eat too much, or mad and eat too little. Some moderns have indeed appeared with vague versions of progress and evolution which seeks to destroy the MESON or balance of Aristotle. They seem to suggest that we are meant to starve progressively, or to go on eating larger and larger breakfasts every morning for ever. But the great truism of the MESON remains for all thinking men, and these people have not upset any balance except their own. But granted 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 follow for a moment the clue of the martyr and the suicide; and take the case of courage. No quality has ever so much addled the brains and tangled the definitions of merely rational sages. Courage is almost a contradiction in terms. It means a strong desire to live taking the form of a readiness to die. “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. No philosopher, I fancy, has ever expressed this romantic riddle with adequate lucidity, and I certainly have not done so. But Christianity has done more: it has marked the limits of it in the awful graves of the suicide and the hero, showing the distance between him who dies for the sake of living and him who dies for the sake of dying. And it has held up ever since above the European lances the banner of the mystery of chivalry: the Christian courage, which is a disdain of death; not the Chinese courage, which is a disdain of life.
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. (Orthodoxy, from chapter 6, the whole of which is well worth reading)