Gen 37:4

“Envy is a terrible passion, you see, and when it affects the soul, it does not leave it before bringing it to an extremely sorry state. [It damages] the soul that gives it birth and affect[s] the object of its envy in the opposite way to that intended, rendering him more conspicuous, more esteemed, more famous—which in turn proves another severe blow to the envious person. Notice at any rate in this instance how this remarkable man is depicted as ignorant of what was going on and conversing cheerfully in great simplicity with them as his brothers who had caused the same birth pangs as he.… They for their part were in the grip of the passion of envy and were thus brought to hate him.”

“And Joseph was loved by his father a great deal. And he gave him a multicolored garment as an excellent gift and a proof of the love with which he accompanied him. And this was an incentive to envy for his brothers and a cause of hatred, as the following events will demonstrate. In fact, the Pharisees were inflamed with anger against the beloved, that is, Christ, because he had been clothed by God the Father with a multiform glory. He was admirable in different forms, partly as a vivifying God, partly as a light that was able to illuminate those who were in the darkness, and to purify the lepers, and to raise from the dead those who were already decomposing, and to reprove the seas and to be carried on the waves through his power. And the Jews being in difficulty and burning with the flames of envy, said to each other, "What are we to do? This man is performing many signs." The multicolored garment is the symbol of the multiform glory with which God the Father clothed the Son made similar to us through his human nature. However, with regard to his own nature, he himself is the Lord of glory, even though, because of the likeness he has with us, he says, "Father, glorify your Son." Therefore for the reasons that I have examined, the sons of the concubines were induced to anger and envy and became suspicious after the dream was related. Since they knew in advance that in time they would have become subjects to their brother and would have adored him, and he would have been superior to them by far and would have been brought to such a glory to be adored by their own parents, they gnashed their teeth and planned to kill him. And so the Jews were angered too, and not less afflicted, since they understood that the Immanuel would have been superior to the holy patriarchs themselves and would have been necessarily adored by all the people and indeed by the whole world. And being aware of this, they said, "This is the heir; come, let us kill him, and the inheritance will be ours."”

“It is written concerning blessed Joseph, dearly beloved, that his brothers envied him and therefore "could not even greet him." It is true, beloved brothers, that so dangerous is the disease of envy that it cannot even spare brothers, not to mention strangers. Indeed, at the very beginning of the world Cain, a wicked brother, killed the just Abel through envy. Holy and faithful Joseph then was shown to be a more just servant of the Lord because of his tribulations. Through envy he was first sold by his brothers to the Ishmaelites as a slave, and after having been sold by the very people by whom he had seen himself worshiped, he was later handed over to an Egyptian master.”

“(1) HIS BROTHERS SAW THAT HIS FATHER LOVED HIM. Ya'akov's error consisted in having different attitudes towards his children in a way that the brothers would recognize the love in his mind. (2) THEY COULD NOT SPEAK A FRIENDLY WORD TO HIM. Even though they had to speak with him regarding household management and herding the flock, since he was in charge, by the instruction of his father, they could not speak to him in peace and companionship, in the way of brothers.”