If we go to the Scriptures and claim, by faith, the Spirit’s help in overcoming our sins, we enter into the enjoyment of the fullness of spiritual life and blessing. If we fail to do so, we wither and die — as far as our spiritual experience is concerned. We can never lose our salvation, of course, for “everlasting life” was obtained by faith in Christ, not by walking in the Spirit. This is confirmed by the fact that the same apostle who pleads: “Grieve not the Holy Spirit of God,” hastens to add: “WHEREBY YE ARE SEALED UNTO THE DAY OF REDEMPTION” (Eph. 4:30).
But failure to appropriate God’s gracious provision for victory over sin does result in death as far as our Christian experience is concerned. This is what the Apostle means, when he says, by the Spirit:
“FOR TO BE CARNALLY MINDED IS DEATH; BUT TO BE SPIRITUALLY MINDED IS LIFE AND PEACE” (Rom. 8:6).
“FOR IF YE LIVE AFTER THE FLESH, YE SHALL DIE: BUT IF YE THROUGH THE SPIRIT DO MORTIFY [PUT TO DEATH] THE DEEDS OF THE BODY, YE SHALL LIVE” (Rom. 8:13).
To the careless Corinthians, the Apostle Paul exclaimed:
“What? know ye not that your body is the temple of the Holy Spirit, which is in you, which ye have of God, and ye are not your own?
“For ye are bought with a price: therefore glorify God in your body, and in your spirit, which are God’s” (I Cor. 6:19,20). source