“Who are kept by the power of God through faith for salvation ready to be revealed in the last time.”
by the power of God
God guards us by nothing less than his omnipotent power. It is God’s power that guards the believer’s eternal security. This is the power that raised Jesus from the dead (Ro 1:4; 1 Co 1:18; 5:4; 6:14; Php 3:10). This work is strictly God’s work.
Our personal power does not maintain our salvation but by the power of God, “For I am not ashamed of the gospel of Christ, for it is the power of God to salvation for everyone who believes, for the Jew first and also for the Greek,” (Romans 1:16). The same power that delivered us from the penalty of sin delivers us from the power of sin and, ultimately, from the presence of sin.
God’s omnipotent power is operative in our salvation.
Our eternal foe is bent on robbing us of our salvation. However, God throws the military garrison of his omnipotent power around our salvation. This is an impregnable ring of defense. God posts the sentinel of his all-powerful being around us. The enemy cannot possibly break through this kind of defense. God never changes his guard. He is on duty until we arrive in heaven.
There is an inconsistency in believing that God can save us initially but not keep us saved. It is an insidious form of unbelief on the part of a Christian.