Notice that we are granted “all things that pertain to life and godliness” through (1) the knowledge of Him who called us (2) by his precious and very great promises so that (3) we escape corruption and sinful desire. Where do we get those three things? We get them from the Bible. From the Bible we gain knowledge of God, we learn the promises He has made to us, and we learn how to escape corruption and sinful desire. Therefore, the Bible contains all we need for life and godliness. The “all things” that pertain to life and godliness are contained in some form in the Bible. Peter then goes on to talk about how we need to apply the Bible and not just store up head knowledge. We need to make our election sure by applying the Scriptures to our lives. The application (not the interpretation) of the Bible is where there is some wiggle room and can be different for different believers.
(2 Peter 1:2-15 ESV)
May grace and peace be multiplied to you in the knowledge of God and of Jesus our Lord.His divine power has granted to us all things that pertain to life and godliness, through the knowledge of him who called us to his own glory and excellence, by which he has granted to us his precious and very great promises, so that through them you may become partakers of the divine nature, having escaped from the corruption that is in the world because of sinful desire. For this very reason, make every effort to supplement your faith with virtue, and virtue with knowledge, and knowledge with self-control, and self-control with steadfastness, and steadfastness with godliness, and godliness with brotherly affection, and brotherly affection with love. For if these qualities are yours and are increasing, they keep you from being ineffective or unfruitful in the knowledge of our Lord Jesus Christ. For whoever lacks these qualities is so nearsighted that he is blind, having forgotten that he was cleansed from his former sins. Therefore, brothers, be all the more diligent to make your calling and election sure, for if you practice these qualities you will never fall. For in this way there will be richly provided for you an entrance into the eternal kingdom of our Lord and Savior Jesus Christ.Therefore I intend always to remind you of these qualities, though you know them and are established in the truth that you have. I think it right, as long as I am in this body, to stir you up by way of reminder, since I know that the putting off of my body will be soon, as our Lord Jesus Christ made clear to me. And I will make every effort so that after my departure you may be able at any time to recall these things.
(2 Peter 1:2-15 ESV)