For we were not making up clever stories when we told you about the power of our Lord Jesus Christ and his coming again. We have seen his majestic splendor with our own eyes.
And he received honor and glory from God the Father when God's glorious, majestic voice called down from heaven, "This is my beloved Son; I am fully pleased with him."
We ourselves heard the voice when we were there with him on the holy mountain.
Because of that, we have even greater confidence in the message proclaimed by the prophets. Pay close attention to what they wrote, for their words are like a light shining in a dark place -- until the day Christ appears and his brilliant light shines in your hearts.
References for 2 Peter 1:19
Above all, you must understand that no prophecy in Scripture ever came from the prophets themselves
References for 2 Peter 1:20
or because they wanted to prophesy. It was the Holy Spirit who moved the prophets to speak from God.