The fruit of quiet, of living apart, of going apart, experiencing quiet once in a while, can be revealing. Or like sometimes in the middle of the night you wake up and you have a clear insight into something. Resentment in the presence of good is not perhaps illogical for one who feels that he has not been too favored by man or God. It's no fun to be poor. And to stand in your poverty in the presence of obvious wealth.
Sinners often respond negatively to virtue.
Goodness is not universally loved. Even little children not too far along in life will reveal jealousy, envy, spite. The sweetest little thing will manifest another dimension. As adults, with a little practice we learn to control our responses. Most of us are full of foibles, blemished, and marred.