Jealousy lives upon doubts. It becomes madness or ceases entirely as soon as we pass from doubt to certainty. — Francois de la Rochefoucauld

Jealousy is the tribute mediocrity pays to genius. — Fulton J. Sheen

The jealous are troublesome to others, but a torment to themselves. — William Penn
The jealous are possessed by a mad devil and a dull spirit at the same time. — Johann Kaspar Lavater

Jealousy is both reasonable and belongs to reasonable men, while envy is base and belongs to the base, for the one makes himself get good things by jealousy, while the other does not allow his neighbour to have them through envy. — Aristotle

A competent and self-confident person is incapable of jealousy in anything. Jealousy is invariably a symptom of neurotic insecurity. — Robert A. Heinlein

What sort of love is permeated by jealousy? You are jealous because you are unaware that everything you need is inside you. — Peter Deunov

You can only be jealous of someone who has something you think you ought to have yourself. — Margaret Atwood

Jealousy is not at all low, but it catches us humbled and bowed down, at first sight.
Sidonie Gabrielle Colette

Jealousy is never satisfied with anything short of an omniscience that would detect the subtlest fold of the heart.
George Eliot

Jealousy is always born with love, but does not always die with it.
Francois Duc de La Rochefoucauld

Jealousy is simply and clearly the fear that you do not have value. Jealousy scans for evidence to prove the point – that others will be preferred and rewarded more than you. There is only one alternative – self-value. If you cannot love yourself, you will not believe that you are loved. You will always think it’s a mistake or luck. Take your eyes off others and turn the scanner within. Find the seeds of your jealousy, clear the old voices and experiences. Put all the energy into building your personal and emotional security. Then you will be the one others envy, and you can remember the pain and reach out to them.
Jennifer James

Jealousy is a disease, love is a healthy condition. The immature mind often mistakes one for the other, or assumes that the greater the love, the greater the jealousy – in fact, they are almost incompatible; one emotion hardly leaves room for the other.
Robert A. Heinlein

Jealousy is comparison. And we have been taught to compare, we have been conditioned to compare, always compare. Somebody else has a better house, somebody else has a more beautiful body, somebody else has more money, somebody else has a more charismatic personality. Compare, go on comparing yourself with everybody else you pass by, and great jealousy will be the outcome; it is the by-product of the conditioning for comparison.
Osho

Jealousy means ego, jealousy means unconsciousness. Jealousy means that you have not known even a moment of joy and bliss; you are living in misery. Jealousy is a by-product of misery, ego, unconsciousness.
Osho

Jealousy – that jumble of secret worship and ostensible aversion.
Emile M. Cioran

Jealousy is bred in doubts. When those doubts change into certainties, then the passion either ceases or turns absolute madness.
Francois de La Rochefoucauld

Jealousy is both reasonable and belongs to reasonable men, while envy is base and belongs to the base, for the one makes himself get good things by jealousy, while the other does not allow his neighbour to have them through envy.
Aristotle

Jealousy in romance is like salt in food. A little can enhance the savor, but too much can spoil the pleasure and, under certain circumstances, can be life-threatening.
Maya Angelou

It will be found an unjust and unwise jealousy to deprive a man of his natural liberty upon the supposition he may abuse it.
George Washington

It is remarkable that jealousy of individual property in land often goes along with very exaggerated doctrines of tribal or national property in land.
William Graham Sumner