The message is intimately and impressively personal, in that the Lord tells of what was known only to John Whitmer and himself.
The intimately and impressively personal part is contained in verses 3-6:
3 And I will tell you that which no man knoweth save me and thee alone—
4 For many times you have desired of me to know that which would be of the most worth unto you.
5 Behold, blessed are you for this thing, and for speaking my words which I have given you according to my commandments.
6 And now, behold, I say unto you, that the thing which will be of the most worth unto you will be to declare repentance unto this people, that you may bring souls unto me, that you may rest with them in the kingdom of my Father. Amen.
Read on its own, that does indeed seem intimately and impressively personal. After all, the Lord is speaking of things that only He and John Whitmer know. But then a strange thing happens. The same revelation is given in section 16 verbatim except for the substitution of "Peter" for "John" Whitmer. The same wording about telling Peter "that which no man knoweth save" the Lord and Peter alone is given.
Can someone explain this to me? Is this suggesting that Peter and John both wanted to know the same thing, and therefore only the Lord knew that? Can identical revelations be intimately and impressively personal?