That It is the Prerogative of the Same Power to Be Beneficent and to Punish Justly. Also the Manner of the Instruction of the Logos
In fine, the system He pursues to inspire fear is the source of salvation. And it is the prerogative of goodness to save: “The mercy of the Lord is on all flesh, while He reproves, corrects, and teaches as a shepherd His flock. He pities those who receive His instruction, and those who eagerly seek union with Him.” And with such guidance He guarded the six hundred thousand footmen that were brought together in the hardness of heart in which they were found; scourging, pitying, striking, healing, in compassion and discipline: “For according to the greatness of His mercy, so is His rebuke.” For it is indeed noble not to sin; but it is good also for the sinner to repent; just as it is best to be always in good health, but well to recover from disease. So He commands by Solomon: “Strike your son with the rod, that you may deliver his soul from death.” And again: “Abstain not from chastising your son, but correct him with the rod; for he will not die.”
For reproof and rebuke, as also the original term implies, are the stripes of the soul, chastizing sins, preventing death, and leading to self-control those carried away to licentiousness. Thus also Plato, knowing reproof to be the greatest power for reformation, and the most sovereign purification, in accordance with what has been said, observes, “that he who is in the highest degree impure is uninstructed and base, by reason of his being unreproved in those respects in which he who is destined to be truly happy ought to be purest and best.”
For if rulers are not a terror to a good work, how shall God, who is by nature good, be a terror to him who sins not? “If you do evil, be afraid,” says the apostle. Wherefore the apostle himself also in every case uses stringent language to the Churches, after the Lord's example; and conscious of his own boldness, and of the weakness of his hearers, he says to the Galatians: “Am I your enemy, because I tell you the truth?” Thus also people in health do not require a physician, do not require him as long as they are strong; but those who are ill need his skill. Thus also we who in our lives are ill of shameful lusts and reprehensible excesses, and other inflammatory effects of the passions, need the Saviour. And He administers not only mild, but also stringent medicines. The bitter roots of fear then arrest the eating sores of our sins. Wherefore also fear is salutary, if bitter. Sick, we truly stand in need of the Saviour; having wandered, of one to guide us; blind, of one to lead us to the light; thirsty, “of the fountain of life, of which whosoever partakes, shall no longer thirst;” dead, we need life; sheep, we need a shepherd; we who are children need a tutor, while universal humanity stands in need of Jesus; so that we may not continue intractable and sinners to the end, and thus fall into condemnation, but may be separated from the chaff, and stored up in the paternal garner. “For the fan is in the Lord's hand, by which the chaff due to the fire is separated from the wheat.” You may learn, if you will, the crowning wisdom of the all-holy Shepherd and Instructor, of the omnipotent and paternal Word, when He figuratively represents Himself as the Shepherd of the sheep. And He is the Tutor of the children. He says therefore by Ezekiel, directing His discourse to the elders, and setting before them a salutary description of His wise solicitude: “And that which is lame I will bind up, and that which is sick I will heal, and that which has wandered I will turn back; and I will feed them on my holy mountain.” Such are the promises of the good Shepherd.
Feed us, the children, as sheep. Yea, Master, fill us with righteousness, Your own pasture; yea, O Instructor, feed us on Your holy mountain the Church, which towers aloft, which is above the clouds, which touches heaven. “And I will be,” He says, “their Shepherd,” and will be near them, as the garment to their skin. He wishes to save my flesh by enveloping it in the robe of immortality, and He has anointed my body. “They shall call Me,” He says, “and I will say, Here am I.” You heard sooner than I expected, Master. “And if they pass over, they shall not slip,” says the Lord. For we who are passing over to immortality shall not fall into corruption, for He shall sustain us. For so He has said, and so He has willed. Such is our Instructor, righteously good. “I came not,” He says, “to be ministered unto, but to minister.” Wherefore He is introduced in the Gospel “wearied,” because toiling for us, and promising “to give His life a ransom for many.” For him alone who does so He owns to be the good shepherd. Generous, therefore, is He who gives for us the greatest of all gifts, His own life; and beneficent exceedingly, and loving to men, in that, when He might have been Lord, He wished to be a brother man; and so good was He that He died for us.
Further, His righteousness cried, “If you come straight to me, I also will come straight to you but if you walk crooked, I also will walk crooked, says the Lord of hosts;” meaning by the crooked ways the chastisements of sinners. For the straight and natural way which is indicated by the Iota of the name of Jesus is His goodness, which is firm and sure towards those who have believed at hearing: “When I called, you obeyed not, says the Lord; but set at nought my counsels, and heeded not my reproofs.” Thus the Lord's reproof is most beneficial. David also says of them, “A perverse and provoking race; a race which set not their heart aright, and whose spirit was not faithful with God: they kept not the covenant of God, and would not walk in His law.”
Such are the causes of provocation for which the Judge comes to inflict punishment on those that would not choose a life of goodness. Wherefore also afterwards He assailed them more roughly; in order, if possible, to drag them back from their impetuous rush towards death. He therefore tells by David the most manifest cause of the threatening: “They believed not in His wonderful works. When He slew them, they sought after Him, and turned and inquired early after God; and remembered that God was their Helper, and God the Most High their Redeemer.” Thus He knew that they turned for fear, while they despised His love: for, for the most part, that goodness which is always mild is despised; but He who admonishes by the loving fear of righteousness is reverenced.
There is a twofold species of fear, the one of which is accompanied with reverence, such as citizens show towards good rulers, and we towards God, as also right-minded children towards their fathers. “For an unbroken horse turns out unmanageable, and a son who is let take his own way turns out reckless.” The other species of fear is accompanied with hatred, which slaves feel towards hard masters, and the Hebrews felt, who made God a master, not a father. And as far as piety is concerned, that which is voluntary and spontaneous differs much, nay entirely, from what is forced. “For He,” it is said, “is merciful; He will heal their sins, and not destroy them, and fully turn away His anger, and not kindle all His wrath.” See how the justice of the Instructor, which deals in rebukes, is shown; and the goodness of God, which deals in compassions. Wherefore David— that is, the Spirit by him— embracing them both, sings of God Himself, “Justice and judgment are the preparation of His throne: mercy and truth shall go before Your face.” He declares that it belongs to the same power both to judge and to do good. For there is power over both together, and judgment separates that which is just from its opposite. And He who is truly God is just and good; who is Himself all, and all is He; for He is God, the only God.
Source: The Instructor (New Advent)