I occasionally, in the glow of sympathy which embraced me and my confiding friend on the subject of his satisfaction or resentment, was urged to hint at a corresponding experience in my own case; but the signs of a rapidly lowering pulse and spreading nervous depression in my previously vivacious interlocutor, warned me that I was acting on that dangerous misreading, "Do as you are done by." Recalling the true version of the golden rule, I could not wish that others should lower my spirits as I was lowering my friend's.
To be aware of how fruitful the playful mood can be is to be immune to the propaganda of the alienated, which extols resentment as a fuel of achievement.
Eric Hoffer, Reflections on the Human Condition (2006), #29
The independent man kills them—because they don’t exist within him and that’s the only form of existence they know. Notice the malignant kind of resentment against any idea that propounds independence. Notice the malice toward an independent man.
Ayn Rand, Howard Roark describing second-hand men in The Fountainhead (1996), pp. 606-607
This reining-in of the imagination which I am recommending will also forbid us to summon up the memory of past misfortune, to paint a dark picture of the injustice or harm that has been done us, the losses we have sustained, the insults, slights and annoyances to which we have been exposed: for to do that is to rouse into fresh life all those hateful passions long laid asleep—the anger and resentment which disturb and pollute our nature. In an excellent parable, Proclus, the Neoplatonist, points out how in every town the mob dwells side by side with those who are rich and distinguished: so, too, in every man, be he never so noble and dignified, there is, in the depth of his nature, a mob of low and vulgar desires which constitute him an animal. It will not do to let this mob revolt or even so much as peep forth from its hiding-place; it is hideous of mien, and its rebel leaders are those flights of imagination which I have been describing.