That thou mightest know the certainty of those things, wherein thou hast been instructed.
But these are written, that ye might believe that Jesus is the Christ, the Son of God; and that believing ye might have life through his name.
2 Peter 1:15
Moreover I will endeavour that ye may be able after my decease to have these things always in remembrance.
2 Peter 1:16
For we have not followed cunningly devised fables, when we made known unto you the power and coming of our Lord Jesus Christ, but were eyewitnesses of his majesty.