Ephesians 4:30. “And grieve not the Holy Spirit of God, whereby ye are sealed unto the day of redemption.”
We need to understand that our sin grieves God. When we claim to be His children and then behave like children of Satan, He is grieved. The Comforter that He sent us to come beside us, and by Whom we are sealed (kept, protected, set aside for the owner), is pained and offended by our ungodliness.
“And grieve not the Holy Spirit of God, by whom ye have been sealed unto the day of redemption.” We are His temple and all must be avoided which displeases the holy guest. That He dwells in us and we are sealed by Him is the evidence of our eternal security. We are sealed by Him unto the day of redemption. We may grieve Him, but He will never leave those who are washed in the blood of the Lamb. He abides with us forever. in Ephesians 4:32 we find another exhortation how the members of the body of Christ should act towards each other.”