2 Peter 1:10-15 (ESV)
10 Therefore, brothers,[a] be all the more diligent to confirm your calling and election, for if you practice these qualities you will never fall. 11 For in this way there will be richly provided for you an entrance into the eternal kingdom of our Lord and Savior Jesus Christ.
12 Therefore I intend always to remind you of these qualities, though you know them and are established in the truth that you have. 13 I think it right, as long as I am in this body,[b] to stir you up by way of reminder, 14 since I know that the putting off of my body will be soon, as our Lord Jesus Christ made clear to me. 15 And I will make every effort so that after my departure you may be able at any time to recall these things.