2 Peter 1:10-15

10Therefore the rather, brethren, give diligence to make your calling and election sure: for if ye do these things, ye shall never fall: 11For so an entrance shall be ministered to you abundantly into the everlasting kingdom of our Lord and Saviour Jesus Christ.

12Therefore I will not be negligent to put you always in remembrance of these things, though ye know them, and are established in the present truth. 13Indeed, I think it right, as long as I am in this tabernacle, to stir you up by putting you in remembrance; 14Knowing that shortly I must put off this my tabernacle, even as our Lord Jesus Christ hath shown me. 15Moreover I will endeavour that ye may be able after my decease to have these things always in remembrance.