You are dealing with a bad translation. I believe the proper understanding of the Greek behind the English is expressed by the commentators of the NET Bible.
20 Above all, you do well if you recognize this: No prophecy of scripture ever comes about by the prophet’s own imagination, 21 for no prophecy was ever borne of human impulse; rather, men carried along by the Holy Spirit spoke from God. 2 Peter 1:20-21 NET Bible
Peter isn't saying anything about how to read and understand the scriptures here. His focus is entirely on the source of divine revelation.
First of all, the kjv is not a bad translation.
Secondly, the NET is a bad translation. I believe that it is that very translation that gives Jehovah's Witnesses an out from a very clear-cut verse that speaks of the Deity of Christ (Acts of the Apostles 20:28) by translating it slightly differently so that it does not support that doctrine.
As we carefully parse Paul's thought here, we must account for the phrase "this grace in which we stand", which assumes there are other "graces" God might grant. For we understand that heart surgery is another grace God grants, which isn't a grace in which we stand but a grace that predicated our walk of faith. Some of us believe that if God had not softened our hearts and opened our eyes, we would never have come to saving faith.
We must assume that "this grace wherein we stand" in Romans 5:1-2, is saving grace; and that therefore it is the grace that regenerates and renews the human soul in the Holy Ghost.
And therefore, since we have access to this grace by faith, it should be clear that regeneration does not come about apart from faith first being in the individual. Therefore faith is the catalyst for regeneration; and not regeneration the catalyst for faith.
We find something similar in John 1:12.
It does not say, "To them who became the sons of God, to them he gave the power to believe in and receive Him."
(You would expect it to say that if the Calvinistic view on the order in salvation were applicable.)
It puts things in the opposite order.
Jhn 1:12
But as many as received him, to them gave he power to become the sons of God, even to them that believe on his name:
Therefore, if you (unbelievers) continue in His goodness ... (22). >>>What is His Goodness? HIS Grace, His Love, His Word, His guidance that leads you to salvation, when He calls, you follow and respond.
>>> Unbelief is not continuing in that path towards salvation and not continuing in His goodness.
Redefining goodness as being a profession of faith in Jesus; whether that profession changes the life of the "believer" or not, I believe is a misapplication of what God means by goodness. Let us not redefine the word so that it does not mean what it means when we look it up in the English dictionary. Let us teach that goodness is defined morally by adhering to the moral tenets in the word of the Lord.