Often jealousy is but rancor under a sense of humiliation. Indeed,

Jealousy is a sign of weakness:

The lover whose self-confidence assures him of his pre-eminence fears no rival. Yet

Male self-confidence is peculiarly vulnerable where women be concerned, since,

As no man knows what it is appeals to a woman, he does not know on what to pride himself:

Even an Othello is jealous of even an Iago. Yet

It is only the spectators who see the folly of Othello.
Desdemonas usually are helpless as they are oblivious.

* * *

The illicitly favored lover is never jealous of the husband; but of another illicitly favored lover, how jealous he is. But

Jealousy, like modesty, and like virtue, varies with every time and clime: what is customary in Cairo would rouse consternation in Kent, and what goes on in Vienna shocks New England. So,