Notice something here with me; will you think with me?
Think on this in 2
et. 3:18, " But " Grow in Grace." Just those three words. The verse talks about growing in the knowledge of Christ, many of us understand growing in knowledge, but what is growing in the Grace of Christ? Just how do we do that? Well we don't do it, its done for us by Christ. And its an ongoing growing thing that he does for us all. On the average definition, Grace is undeserved Kindness. This means that Jesus is supplying continual underserved kindness to humanity; explain to yourself how a human can be condemned or lost, with this kind of help from Jesus? And that help from him is growing.
This is being supplied because we all need it! As we live and move in our lives, we are growing in Grace from God, because we all keep sinning and failing because we are imperfect beings. Its no way possible ANY of us could qualify for the Kingdom, IF we were not being given this growth of grace. We are being fed a steady supply of forgiveness, because God knows we NEED that; one of the worse things a believer in God could think, is to support doctrines that cut this supply off to any human for any reason!
The Grace of God is not on some time table that runs out on a person during their lives; that's when we NEED grace, ALL of our lives, especially if we are ignorant of God! When sin increases, Grace ALWAYS increases even more to cover the human, because Grace grows MORE than sin! Romans 5:20. With this Holy Math, no sinner can be counted out of salvation.