Malachi 3:6Meaning & Commentary from the Church Fathers

However, you, he continues, though you are descendants of Jacob, a righteous and God-fearing man who consistently abhorred lawlessness and served God, have failed to adopt his values; instead, you emulate the disobedience and obstinacy of your ancestors, who were compelled into captivity from their homeland and enslaved by their enemies. Consequently, God is eternally unchangeable, firmly established in goodness and unwavering in righteousness; yet they retained only fickleness in their hearts, becoming proficient imitators of the wickedness displayed by their forebears. Christ does not address this, justly lamenting the folly of the scribes and Pharisees. He stated: ‘Woe unto you, scribes and Pharisees, hypocrites, because ye build the tombs of the prophets, and paint the tombs of the righteous, and say, If we had been in the days of our fathers, we would not have been their companions in the blood of the prophets: thus, you testify against yourselves that you are the sons of the prophets who were mistreated; and you shall meet the full measure of your fathers’ (Matthew 23:29-32). Therefore, it is imperative for us, if we are genuinely wise and sound of mind, to strive foremost to emulate the noblest of our ancestors and to shun following the unkind. Yet, if anyone chooses to do otherwise, simply adhering to the ways of their forefathers without discernment, they will undoubtedly resemble the children of the Hellenes, who will be rebuked for abandoning the knowledge of truth and forsaking the true God, opting instead to worship stones, all while citing the traditions of their ancestors.

He presents Himself as a righteous Judge who does not show favoritism in His judgments, declaring, “I am the Lord, and I do not change.” The context reveals this meaning: “You, through your wickedness, infidelity, lies, slander, and violence, are perpetually changing; yet I remain constant in judgment, regardless of who stands before Me.” Sons of Jacob! Although I acknowledge that I am a strict and righteous judge, you have not been consumed by various trials as the prophet Jeremiah expresses: “Without reason, in vain I struck your children, yet you did not receive instruction” (Jeremiah 2:30). Your actions are not recent or singular, precluding any hope of absolution; your iniquity is inherited, as you have deviated from My commandments since the time of your ancestors, failing to uphold that which I have commanded. The term “sons of Jacob” refers figuratively to those who, positioned within the Church, do not reject their vices and falsely assume the identity of the Christian faith.

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In the preceding discussion, a question was posed to the Lord by those asserting: “Those who do evil are viewed as good by God, and such individuals are favored by Him; otherwise, where is His justice?” In other words, “Where is the truth in judgment?” To address this inquiry, the Lord responds: “I will send My messenger to prepare My way, and the Lord whom you seek, the righteous Judge, will come to His temple,” as referenced in the Psalm: “O God, give Your judgment to the king, and Your righteousness to the king’s son” (Psalm 71:1). For Scripture teaches: “The Father judges no one, but has entrusted all judgment to the Son” (John 5:22). He, the Angel of the Covenant, is whom you seek; He who finds no acceptance in evil deeds and, in His judgment, does not regard appearances (Colossians 3:25). His demeanor remains unchanged, being neither swayed by mercy nor by severity; His cup is filled with unadulterated wine, which He has inclined (Psalm 74:9), indicating that mercy tempers justice and justice tempers mercy. He will come swiftly to His temple, meaning the Church. Who can fathom the day of His coming? For in the enormity of His power, who can withstand Him? Who can behold Him, as the dim-eyed struggle to see the brilliance of the Sun of Righteousness that brings salvation on His wings? He will arrive like a consuming fire and like the cleansing grass used by clothiers, with fire illuminating His visage and a tempest surrounding Him (Psalm 49:4). At that moment, He will summon both heaven and earth to judge His people; then streams of fire will encompass all sinners, compelling them before Him. The Lord is identified as a consuming fire (Deuteronomy 4:11, 12), akin to hay and stubble. He is both the purifying fire and the herb of the clothiers, known in Hebrew as borith, corresponding to the Seventy’s translation of πόαν from πόα, meaning the herb of the clothiers. He is the fire that purifies for those steeped in grievous sin; for those guilty of lesser sins, He is the herb that offers cleansing, fulfilling what is written: “The Lord has washed away the filth of the sons and daughters of Zion and cleansed the blood from their midst with the spirit of judgment and the spirit of fire” (Isaiah 4:4). Those burdened by impurity require the spirit of judgment for cleansing; those covered in blood need the spirit of fire to eradicate the exterior stain. He shall sit as one who refines and purifies, akin to silver, aligning with the words of the prophet Ezekiel, ensuring that what is found in our gold and silver—in thought and speech—mixed with base metals may be refined in the crucible of the Lord, leaving only pure gold and silver. Thus, the Lord declares in the Gospel: “I have come to cast fire upon the earth, and how I wish it were already kindled” (Luke 12:49). He will purify the children of Levi, for the time has come for judgment to commence within the house of God (1 Peter 4:17). Furthermore, it is inscribed, “Begin from My saints” (Ezekiel 9:6). By “sons of Levi,” we comprehend all priestly roles. If the priests require cleansing so that pure gold and silver may endure, what of the rest? Once they are cleansed, they will offer appropriate sacrifices to the Lord, acceptable to His priesthood, on behalf of Judah and Jerusalem, meaning those who faithfully acknowledge Him and seek His tranquility in their hearts. “As in the days of old, as in former years,” signifies that just as they were initially pleasing to God, they shall once again achieve His favor after repentance and purification from all sinful impurities. He asserts, “I will come to you in judgment, and I will be a swift reprover.” What a grave judgment it shall be, being both the revealer and judge; exposing all wrongdoers and adulterers, for these sins are clandestine and now laid bare, no longer to be hidden. One sin is sufficient for punishment; failure to fear God alone is ground for condemnation. Therefore, we ought not to regard false oaths, underpaying laborers, mistreating orphans and widows, or oppressing strangers as minor transgressions; rather, these are equal to grave misconduct such as blasphemy, poison, and adultery. When analyzing what has been stated, we see implications both for historical occurrences and their allegorical relevance to our present circumstances, such that what was once conveyed to the Jewish leaders now pertains to the rulers within the Church. Lastly, He declares, “I am the Lord, and I do not change,” emphasizing that though He appears to us as a consuming fire or as the herb, He does not alter the nature of His divinity.

The One who remains constant, and outside of whom nothing exists, cannot be augmented or modified by anything external. He declares, "I am, I change not" (Malachi 3:6) — there is no opportunity for alteration, no reason for growth, as there is nothing prior to eternity, and nothing can enhance God, given that nothing exists outside of Him. Thus, God will not become all and in all merely by the addition of the Son. Neither can He be supplemented by any condition — He is the source of every cause, the One through whom and in whom all things consist. He eternally is and remains God; and He, the One through whom all exists and who perpetually remains unchanged, requires no enhancement.