What does it mean to defile the temple of God in 1 Corinthians 3?
To defile the temple of God means to do something harmful to one's physical body, which is now the temple and dwelling place of God. Such defilement invites God to permit ravages that destroy physical health, because the temple is holy and set apart for God's purposes.
Les teaches that in 1 Corinthians 3, defiling the temple means doing something harmful to your physical body, which is now the temple, the dwelling place of God. Paul writes that if any man defiles the temple, God will destroy it; Les explains this means God will permit those ravages to destroy our physical health. The temple of God is holy, set apart for God's purposes, and that is what the believer is. So as soon as a person becomes a believer, he becomes responsible for taking care of this physical body. Les also points to Ephesians 5, where Paul teaches that men ought to love their wives as their own bodies, and no man ever hated his own flesh.
If any man defile the temple of God, him shall God destroy; for the temple of God is holy, which temple ye are.