Ressentiment must therefore be strongest in a society like ours, where approximately equal rights (political and otherwise) or formal social equality… - Max Scheler

We have a tendency to overcome any strong tension between desire and impotence by depreciating or denying the positive value of the desired object.

When we are told, in the same tone, that these people will be rewarded in “heaven” for their distress, and that “heaven” is the exact reverse of the earthly order (“the first shall be last”), we distinctly feel how the ressentiment-laden man transfers to God the vengeance he himself cannot wreak on the great. In this way, he can satisfy his revenge at least in imagination, with the aid of an other-worldly mechanism of rewards and punishments.

"Instead of defining the word, let us briefly characterize or describe the phenomenon. Ressentiment is a self-poisoning of the mind which has quite definite causes and consequences. It is a lasting mental attitude, caused by the systematic repression of certain emotions and affects which, as such, are normal components of human nature. Their repression leads to the constant tendency to indulge in certain kinds of value delusions and corresponding value judgments. The emotions and affects primarily concerned are revenge, hatred, malice, envy, the impulse to detract, and spite.