Nevertheless, "as the heavens are high above the earth, so is wisdom above folly." Goethe compares life to a game at whist, where the cards are dealt out by destiny, and the rules of the game are fixed: subject to these conditions, the players are left to win or lose, according to their skill or want of skill. The life of a nation, like the life of a man, may be prolonged in honor into the fulness of its time, or it may perish prematurely, for want of guidance, by violence or internal disorders. And thus the history of national revolutions is to statesmanship what the pathology of disease is to the art of medicine. The physician cannot arrest the coming on of age. Where disease has laid hold upon the constitution he cannot expel it. But he may check the progress of the evil if he can recognize the symptoms in time. He can save life at the cost of an unsound limb. He can tell us how to preserve our health when we have it; he can warn us of the conditions under which particular disorders will have us at disadvantage. And so with nations: amidst the endless variety of circumstances there are constant phenomena which give notice of approaching danger; there are courses of action which have uniformly produced the same results; and the wise politicians are those who have learnt from experience the real tendencies of things, unmisled by superficial differences, who can shun the rocks where others have been wrecked, or from foresight of what is coming can be cool when the peril is upon them. For these reasons, the fall of the Roman Republic is exceptionally instructive to us. A constitutional government the most enduring and the most powerful that ever existed was put on its trial, and found wanting. We see it in its growth; we see the causes which undermined its strength. We see attempts to check the growing mischief fail, and we see why they failed. And we see, finally, when nothing seemed so likely as complete dissolution, the whole system changed by a violent operation, and the dying patient's life protracted for further centuries of power and usefulness.