2 Corinthians 11:21
4 For envy is a fearful, a fearful thing, and persuades men to despise their own salvation. In this way did both Cain destroy himself, and again, before his time, the devil who was the destroyer of his father. So did Saul invite an evil demon against his own soul; and when he had invited, he again envied his physician. For such is the nature of envy; he knew that he was saved, yet he would rather have perished than see him that saved him had in honor. What can be more grievous than this passion?
One cannot err in calling it the devil's offspring. And in it is contained the fruit of vainglory, or rather its root also; for both these evils are wont mutually to produce each other. And thus in truth it was that Saul even thus envied, when they said, “David smote by ten thousands,” than which what can be more senseless? For why do you envy? Tell me! 'Because such an one praised him?' Yet surely you ought to rejoice; besides, thou dost not know even whether the praise be true.
And do you therefore grieve because without being admirable he has been praised as such? And yet you ought to feel pity. For if he be good, you ought not to envy him when praised, but yourself to praise along with those that speak well of him; but if not such, why are you galled? Why thrust the sword against yourself? 'Because admired by men.' But men today are and tomorrow are not. 'But because he enjoys glory?' Of what sort, tell me? That of which the prophet says that it is “the flower of grass.” Are you then therefore envious because you bear no burden, nor carriest about with you such loads of grass?
But if he seems to you to be enviable on this account, then why not also woodcutters who carry burdens every day and come to the city [with them]? For that burden is nothing better than this, but even worse. For theirs indeed galls the body only, but this has oftentimes harmed the soul even and occasioned greater solicitude than pleasure. And should one have gained renown through eloquence, the fear he endures is greater than the good report he bears; yea, what is more, the one is short, the other perpetual. 'But he is in favor with those in authority?'
In that too again is danger and envy. For as you feel towards him, so do many others feel. 'But he is praised continually?' This produces bitter slavery. For he will not dare to do fearlessly anything of what according to his judgment he should, lest he should offend those that extol him, for that distinction is a hard bondage to him. So that the more he is known to, so many the more masters he has, and his slavery becomes the greater, as masters of his are found in every quarter.
A servant indeed, when he is released from the eye of his master, both takes breath and lives in all freedom; but this man meets with masters at every turn, for he is the slave of all that appear in the forum. And even should some necessary object press, he dares not set foot in the forum, except it be with his servants following, and his horse, and all his other show set in array, lest his masters condemn him. And if he sees some friend of those who are truly so, he has not the boldness to talk with him on an equal footing: for he is afraid of his masters, lest they depose him from his glory.
So that the more distinguished he is, so much the more he is enslaved. And if he suffer anything that is disagreeable, the insult is the more annoying, both in that he has more to witness it and it seems to infringe his dignity. It is not only an insult, but a calamity also, for he has also many who exult at it; and in like way if he come to the enjoyment of any good thing, he has more who envy and detract and do their vigilance to destroy him. Is this then a good? Tell me. Is this glory?
By no means; but ingloriousness, and slavery, and bonds, and every burdensome thing one can say. But if the glory that comes of men be so greatly to be coveted in your account, and if it quite disquiets you that such and such an one is applauded of the many; when you behold him in the enjoyment of that applause, pass over in your thought to the world to come and the glory which is there. And just as when hurrying to escape the onset of a wild beast, you enter into a cabin and shuttest to the doors; so now also flee unto the life to come, and that unspeakable glory.
For so shall you both tread this under your feet, and wilt easily lay hold upon that, and wilt enjoy the true liberty, and the eternal good things; whereunto may we all attain through the grace and love towards men of our Lord Jesus Christ, with Whom to the Father, with the Holy Spirit, be glory, might, honor, now and ever, and world without end. Amen.
Source: Homilies on Second Corinthians (New Advent)