Compliments of mailmandan on 2Peter 2:20
Please show me the words "forfeited being God's child" or "no longer a child of God." Those who are truly born of God have received a new nature, a divine nature, and they have new and different appetites and desires.
They have been transformed from pigs and dogs into sheep. The change is more than just cosmetic, as in 2 Peter 2:20.
Compare 2 Peter 1:4 - "partakers of the divine nature, having escaped the corruption - Strongs #5356
that is in the world through lust with 2 Peter 2:20 - with they escaped the pollutions - Strongs #3356 (different Greek word) of the world through the knowledge of the Lord and Saviour Jesus Christ, yet they are again entangled therein, and overcome. Notice that 2 Peter 2:20 did not mention them being "partakers of the divine nature."
Corruption (Strongs #5356) (to shrivel or wither, spoil , ruin , deprave, corrupt , defile, to destroy by means of corrupting, to spoil as does milk). Corruption - describes decomposition or rotting of an organism and the accompanying stench. The utter depravity of the fallen flesh and the resultant moral decomposition of the world opposed to God is driven by it sinful lusts or evil desires. Internal corruption.
Pollutions/Defilements (Strongs #3393) ("pollutions", "filthy things", "contaminations", "world's filth") describes the state of being tainted or stained by evil and refers to impurity, impure, tainted, defilement, foulness or pollution.
Pollutions/Defilement refers to what is on the outside (2 Peter 2:20). But genuine believers have escaped the corruption that is in the world through lust (2 Peter 1:4).
Corruption is deeper than pollutions/defilements on the outside: it is decay on the inside