Isaiah 1:20Meaning & Commentary from the Church Fathers

In order to avoid giving rise to complacency through the mention of the blessings, he finishes his discourse with a grave warning, reinforcing its certainty by the authority of the one who proclaimed it.

The Almighty God, speaking through the wise Moses to the Israelites, stated, ‘I have set before you life and death’ (Deuteronomy 30:15). Within us lies a longing for both paths, with the outcome of each person's choice leading either to a life illuminated by divine law or to a life deserving of reproach. It is undeniable that those who choose a righteous and God-pleasing way are assured of life, while those who seek unclean pleasures face inevitable death and ruin. The reward for obedience is the enjoyment of the abundance of the land, as our Lord Jesus Christ affirmed when He said, Blessed are the meek, for they shall inherit the earth (Matthew 5:4). Conversely, the outcome of a life marked by wickedness is futile regret, along with strife and devastation due to divine judgment.

In a similar way, the sword is depicted as alive, taking in the blood from the plagues, as noted in Jeremiah 46:10. In the heavenly realm, it is said to gird the flesh, as referenced in Isaiah 34:5. The Lord has declared these truths. It is possible that the term "mouth" refers to the Holy Spirit, who played a role in the composition of this message, for it is stated that the Spirit comes forth from the mouth of God. Do not dismiss these warnings lightly; the word of the Lord assures us that no deceitful lips have uttered these declarations. Yet, who is so spiritually blind that they focus solely on earthly rewards—a mere sustenance, like the fruits of the ground, which are destined for decay?

Due to their refusal to heed the warnings, but instead inciting the anger of the Holy One of Israel, they were consumed by the sword, signifying their destruction at the hands of the Roman forces. All of this, He states, shall indeed come to pass, for the word of the Lord has been proclaimed, and as long as sin persists, His purpose remains unaltered.

The phrase, 'The sword shall devour you,' indicates that the unfaithful will not face death by physical swords; rather, God's sword represents fire, which is the sustenance for those who choose to commit wrongdoing. Thus, it is declared, 'The sword shall devour you: for the mouth of the Lord hath said it.' If the prophet had referred to a sword that inflicts a cut and then stops, he would not have used the term 'shall devour.'

It is understood that even the most righteous individuals have been handed over to Satan or have faced intense hardships for minor wrongdoings, as the grace of God ensures that not even the slightest blemish of sin remains in them at the time of the Final Judgment, nor any moral impurity in their hearts. God refines them in this earthly existence so that they may enter eternity as precious metals, like gold or silver, cleansed by fire, without requiring any form of purification through suffering.

The portrayal of the Lord as one who forgives sins encompasses both His justice and His mercy, allowing us to recognize that forgiveness is offered only to those who seek Him earnestly, while the consequence of eternal separation from Him is reserved for those who remain entrenched in sin. In Isaiah, we encounter a striking and stern divine verdict against those who resist and disdain the mercy of the Lord. This indicates that no one adheres to God's commandments in vain, and no one can live in sin without facing repercussions. Who would be so disrespectful and foolish as to ignore the promise of joy offered in these divine words of encouragement? Even the fear of judgment would surely prompt one to turn back. Certainly, the individual who disregards God's word will not find salvation but will instead face destruction.

Beware if you ignore my admonitions, encouragements, and warnings; calamity will befall you, and what has happened to those who have fallen at the hands of the adversary will also happen to you. The assurances of divine compassion for those who heed the Lord's commands, as well as the grim warnings for those who rebel, will undoubtedly come to pass, for it is declared by the Lord: ‘God is not a man that He should lie, nor the son of man that He should be changed. Will He say and not do, will He speak and not fulfil?’ (Num. 23:19).