And this was said as though to Doeg, who was a Syrian by descent, but lived in the midst of Israel—and, I suppose, perhaps even entered the tabernacle of God along with the multitude, pretending to be pious. But it was also said to everyone who is powerful in wickedness, who uses his tongue instead of a sword for the destruction of souls: the "farmer of souls" would pluck him out just like some bitter and destructive root, even if he seems for some brief time to have been planted in the tabernacle of God and in his Church. Such a person, after being plucked out and cast away far from the tabernacle of the holy, will lie as a pitiable spectacle for the benefit and chastening of those who see him—they will take in with their eyes the severe judgment of God against such a person and will make every effort and guard themselves against falling into a similar situation. Later, when they recall with their memory the former boasting of the one who was powerful in wickedness, his grandeur and arrogance, but also see the humiliation and destruction that pursued him after that, they will consider him a laughing-stock, considering how he has fallen so low from such a height. And they will accept the judgment of God, confessing that it is righteous. Then, they will also go through the reasons why the impious one has suffered these things and justify God's judgment. For he ought not to have been haughty-minded over riches, nor to have been exalted over the vanity of the present life, but to have made God alone his hope and help, and not to have wavered in this hope. But he abandoned the good anchor of his own soul, and by hanging his hopes on vain wealth he made himself a joke, incurring nothing more than laughter for his vain and thoughtless boastfulness.
"And the just shall see, and shall fear; and over him they shall laugh" [Psalm 52:7]. Shall fear when? Shall laugh when? Let us therefore understand, and make a distinction between those two times of fearing and laughing, which have their several uses. For so long as we are in this world, not yet must we laugh, lest hereafter we mourn. We have read what is reserved at the end for this Doeg, we have read and because we understand and believe, we see but fear. This, therefore, has been said, "The just shall see, and shall fear." So long as we see what will result at the end to evil men, wherefore do we fear? Because the Apostle has said, "In fear and trembling work out your own salvation:" [Philippians 2:12] because it has been said in a Psalm, "Serve the Lord in fear, and exult unto Him with trembling." Wherefore "with fear"? "Wherefore let him that thinks himself to stand, see that he fall not." [1 Corinthians 10:12] Wherefore "with trembling"? Because he says in another place: "Brethren, if a man shall have been overtaken in any delinquency, you that are spiritual instruct such sort in the spirit of gentleness; heeding yourself, lest you also be tempted." [Galatians 6:1] Therefore, the just that are now, that live of faith, so see this Doeg, what to him is to result, that nevertheless they fear also for themselves: for what they are today, they know; what tomorrow they are to be, they know not. Now, therefore, "The just shall see, and they shall fear." But when shall they laugh? When iniquity shall have passed over; when it shall have flown over; as now to a great degree has flown over the time uncertain; when shall have been put to flight the darkness of this world, wherein now we walk not but by the lamp of the Scriptures, and therefore fear as though in night. For we walk by prophecy; whereof says the Apostle Peter, "We have a more sure prophetic word, to which giving heed ye do well, as to a lamp shining in a dark place, until the day shine, and the day-star arise in your hearts." [2 Peter 1:19] So long then as by a lamp we walk, it is needful that with fear we should live. But when shall have come our day, that is, the manifestation of Christ, whereof the same Apostle says, "When Christ shall have appeared, your life, then ye also shall appear with Himself in glory," [Colossians 3:4] then the just shall laugh at that Doeg....
[AD 339] Eusebius of Caesarea on Psalms 52:7