2 Peter 3:15

‘Even as our beloved brother Paul also, according to the wisdom given to him, wrote to you,'

The thought of the fullness of that salvation then turns his thoughts to the outstanding descriptions of that salvation in Paul's letters. Note that he assumes that they will have read his own first letter (2 Peter 3:1). His description of the inspiration that Paul had as ‘the wisdom given to him' probably arose because he remembered how Jesus had said to him, ‘flesh and blood has not revealed this to you, but My Father Who is in Heaven' (Matthew 16:17). Compare also Matthew 11:25; Luke 7:35; Luke 11:49; Luke 21:15).

Peter's heart of love is again revealed in the way that he describes Paul. Only those who know the love that arises among fellow-workers for Christ working in harmony in the Lord's service can fully understand his greeting. They had preached together and they had no doubt suffered together. This description is in complete contrast with how Paul was spoken of by later writers, e.g. ‘the blessed and glorious Paul' (Polycarp); ‘the blessed Paul' (1 Clment; Polycarp); ‘the sanctified Paul -- right blessed' (Ignatius), but it is typical of descriptions between fellow-workers who mutually appreciate each other, confirming Peter's relationship with Paul.