Answer: Some people have in an outward way participated in those things that true Christians do, then they decide they don’t want it. They turned away on purpose. But the cable of salvation can never be broken, though we can lose the enjoyment of that salvation. (Psalm 51:12).
Scriptures that tell us we cannot lose our salvation:–John 10:27-30. We can’t even take ourselves out of the Lord’s hand.–Ephesians 1:13,14, tell us that when we believe, we are given the Holy Spirit which is a seal that says that we are God’s.–Ephesians 4:30 says not to grieve the Holy Spirit (we grieve Him when we do wrong), but He is never grieved away.–Romans 8:23 speaks of the redemption of our bodies. If we are saved, our souls are redeemed. But we don’t have the redemption of our bodies yet though we will when the Lord comes again.–Romans 11:29. Our salvation is a gift from God. We don’t do anything to save ourselves but receive God’s gift by faith. It is all the work of God, and it is forever. Romans 6:28, John 1:12.
"Study to shew thyself approved unto God." 2 Timothy 2:15