Matthew Poole and continuators on Romans 15:17

17. I have therefore whereof I may glory through Jesus Christ, in those things which pertain to God .

q. d. Having received this grace of Apostleship, and having had great success in my Labours, multitudes being converted by my Ministry, I have whereof to Glory, or I have matter of Glorying and Rejoycing. But then he adds, that this Glorying of his, was not in himself, but in and through Iesus Christ, by whose grace he did what he did, vid. 1 Cor. 15.10. And also, that it was not in any thing that concerned himself, but in things pertaining to God, which concerned his Worship and Service, and wherein his Ministry consisted. In the foregoing verse he described his Apostleship in termes, that were borrowed from the Livitical-Priesthood; and here contriving the same metaphor, he calleth the execution of his Function, a performing of things pertaining to God, which is that for which the Priests of old were ordained, Heb. 5.1.