Directly jealousy comes into existence, this turn of feelings continues in itself the same, though the effect it is to produce is contrary. Each perfection that you add to the crown of your beloved, who now perhaps loves someone else, far from promising you a heavenly contentment, thrusts a dagger into your heart. A voice cries out: "This enchanting pleasure is for my rival to enjoy."[1]
Even the objects which strike you, without producing this effect, instead of showing you, as before, a new way of winning her love, cause you to see a new advantage for your rival.
You meet a pretty woman galloping in the park[2]; your rival is famous for his fine horses which can do ten miles in fifty minutes.
In this state, rage is easily fanned into life; you no longer remember that in love possession is nothing, enjoyment everything. You exaggerate the happiness of your rival, exaggerate the insolence happiness produces in him, and you come at last to the limit of tortures, that is to say to the extremest unhappiness, poisoned still further by a lingering hope.
The only remedy is, perhaps, to observe your rival's happiness at close quarters. Often you will see him fall peacefully asleep in the same salon as the woman, for whom your heart stops beating, at the mere sight of a hat like hers some way off in the street.
To wake him up you have only to show your jealousy. You may have, perhaps, the pleasure of teaching him the price of the woman who prefers him to you, and he will owe to you the love he will learn to have for her.
Face to face with a rival there is no mean—you must either banter with him in the most off-hand way you can, or frighten him.
Jealousy being the greatest of all evils, endangering one's life will be found an agreeable diversion. For then not all our fancies are embittered and blackened (by the mechanism explained above)—sometimes it is possible to imagine that one kills this rival.
According to this principle, that it is never right to add to the enemy's forces, you must hide your love from your rival, and, under some pretext of vanity as far as possible removed from love, say to him very quietly, with all possible politeness, and in the calmest, simplest tone: "Sir, I cannot think why the public sees good to make little So-and-so mine; people are even good enough to believe that I am in love with her. As for you, if you want her, I would hand her over with all my heart, if unhappily there were not the risk of placing myself into a ridiculous position. In six months, take her as much as ever you like, but at the present moment, honour, such as people attach (why, I don't know) to these things, forces me to tell you, to my great regret, that, if by chance you have not the justice to wait till your turn comes round, one of us must die."
Your rival is very likely a man without much passion, and perhaps a man of much prudence, who once convinced of your resolution, will make haste to yield you the woman in question, provided he can find any decent pretext. For that reason you must give a gay tone to your challenge, and keep the whole move hidden with the greatest secrecy.