True jealously wants not only fidelity, but the proof of fidelity as an imaginable situation. A jealous man is not content with his beloved not being unfaithful. Precisely that which he is not doing does not leave him in peace. But since there is no proving what is not done and the jealous man insists on proof, he ends up settling on proof of unfaithfulness.

Jealousy is that pain which a man feels from the apprehension that he is not equally beloved by the person whom he entirely loves.

Jealousy is the theory that some other fellow has just as little taste.

Jealousy, the jaundice of the soul.

28. — Jealousy is in a manner just and reasonable, as it tends to preserve a good which belongs, or which we believe belongs to us, on the other hand envy is a fury which cannot endure the happiness of others.

Jealousy is perhaps the most involuntary of all strong emotions. It steals consciousness, it lies deeper than thought. It is always there, like a blackness in the eye, it discolours the world.

Jealousy is always a mask for fear: fear that we aren’t able to get what we want; frustration that somebody else seems to be getting what is rightfully ours even if we are too frightened to reach for it. At its root, jealousy is a stingy emotion.

Jealousy differs from envy in being infinitely more spiteful, as well as more impassioned and less restrained. Jealousy arises out of an opinion as to what is one’s due; it is not purely a sense of inferiority, as is envy.

Jealousy is a strange transformer of characters.

Jealousy is a dog's bark which attracts thieves.

Jealousy is like a raging toothache. One cannot do anything when one is jealous, not even sit down. Once can only come and go. Back and forth.

Jealousy has the amazing power to illuminate a single person in an intense beam of light, keeping the multitude of others in total darkness.

Jealousy is a “human universal,” and no culture lacks it, Despite the best efforts of anthropologists to find a society with no jealousy and so prove that it is an emotion introduced by pernicious social pressure or pathology, sexual jealousy seems to be an unavoidable part of being a human being.

Jealousy is the cause of erosion of good deeds, as well as the attracter of chastisement.