But look what sentence will then fall upon you: "If anyone destroys the temple of God, God will destroy him."
"He will destroy," that is, He will hand him over to perdition. "The Apostle does not curse, but foretells" (Saint Chrysostom).
What stronger admonition could be expected? One feels a sword over the head.
Why such punishment for destroying the temple of God? Because it is holy. It is holy because it belongs to God and is the dwelling place of the Spirit, and its foundation is Christ the Lord.
Whoever destroys the temple sins directly against God, worshiped in the Trinity. When the Jewish authorities intended to ruin the Church of Jerusalem, Gamaliel turned them away from this by frightening them.
He said, "lest we be found fighting against God" (Acts 5:39). The same thought is here.
"Which you are." The Apostle intentionally added this word, giving them to understand: this is what you are.
Again he turns to the whole community of believers and gives them a lesson. Since you have such high dignity, how have you allowed yourselves to be placed in such a condition that you may lose the Spirit?
At the same time, he impressed this upon the instigators of division. You looked so lightly upon this community of saints and began to tear it apart, yet see what it is.
Such thoughts appear in these verses (1 Cor 3:16-17) according to the course of the Apostle’s discourse. But outside the context they may be applied to founders of heresies and to unrepentant sinners.
Heresy destroys the Church. Mortal sin destroys the soul. For the destruction of the Church the founder of heresy answers: God will destroy him.
For mortal sin, not cleansed by repentance, the sinner answers. God will also destroy him, that is, ruin him, if he does not repent.
If this does not happen here, for it sometimes does, then it will certainly happen there, in the other life.
Saint Paul unfolds this last thought, concerning the destruction of the temple of the soul by the sinner, below, when he warns against fornication (1 Cor 6:15-20).