This episode mostly deals with the believer's response to the gift of divine power in 2 Pet. 1:5-8. Resting on God's divine power, Christians should excel in 9 moral attributes, among them are moral excellence, self-control, and love. Peter concludes that those lacking these qualities are "blind or shortsighted, having forgotten the purification from their former sins." Peter's understanding of the gospel that saves is much more than mere forgiveness of sins, so he likely had much more than mere forgiveness in mind when he refers to "purification." Peter includes the endgame of salvation in both 1 Pet. 1:2 and 1 Pet. 4:1-2, which is obedience and living for the will of God. Believers who apparently see "purification from their former sins" simply in terms of forgiveness, have missed the holistic emphasis of the gospel: God saves us FROM the penalty of sin FOR the will of God. Peter consequently assesses that Christians who only got half the message are "blind and short-sighted." Christians should therefore honestly assess whether their lack of spiritual growth is due to a misunderstanding of the constitution, how things work in the Kingdom: growth in obedience to the will of God is the clear expectation of the gospel.
Self-centered “salvation”
This episode applies the parable of the talents to the ultimate goal of repentance from dead works which is service to God. The servants with 5 and 2 talents had a proper perspective of salvation, which was to bear fruit pleasing to the master. "Trading" involves wins and losses: a perfect description of the Christian life where we still sin. The servant who is God-oriented is open to at least trying to bring his master profit. The wicked, lazy servant has a distorted view of salvation: God is somehow unfair for expecting a return since He hasn't given him seed to sow with. The servant who buried his talent in the ground is completely self-centered and doesn't even consider service to God as the reason for salvation.