The book 2 Peter is an encouragement for God’s church to continue persevering in the Christian life on the basis of God’s promises. He wants us to know that God’s promises are sure, so that we will give ourselves to good works rather than indulging our sinful desires. We must not be taken in by those who say there is no judgment and therefore we may live as we please.
Your fourth sermon from 2 Peter will explain how the transfiguration and prophecies of the Old Testament affirm that Christ will return in glory. Your aim is twofold. For one, you want to encourage Christians to know that what we are taught in the Bible is trustworthy. Any claims that we are being duped by made-up stories can be dismissed. You are not a fool for believing in Christ. A second aim is to explain how certainty of Christ’s return ought to be an incentive for obedience. If what the Scriptures teach are true, then we should submit to them. Finally you might also want to explain how Scriptures came about and that, even though the pages of the Bible were written by men, God the Holy Spirit was inspiring them.
16 For we did not follow cleverly devised myths when we made known to you the power and coming of our Lord Jesus Christ, but we were eyewitnesses of his majesty.