Truth will bear repetition

^12-15 I shall not fail to remind you of things like this although you know them and are already established in the truth. I consider it my duty, as long as I live in the temporary dwelling of this body, to stimulate you by these reminders. I know that I shall have to leave this body at very short notice, as our Lord Jesus Christ made clear to me. Consequently I shall make the most of every opportunity, so that after I am gone you will remember these things.

^16-17 We were not following a cleverly written-up story when we told you about the power and coming of our Lord Jesus Christ—we actually saw his majesty with our own eyes. He received honour and glory from God the Father himself when that voice said to him, out of the sublime glory of Heaven, ‘This is my beloved Son, in whom I am well pleased’.