For I speak to you Gentiles, inasmuch as I am the apostle of the Gentiles, I magnify mine office:
I speak ('I am speaking') to you Gentiles - another proof that this Epistle was addressed not to Jewish but to Gentile believers (see the note at Romans 1:13),
Inasmuch, as I am the apostle of the Gentiles, I magnify ('glorify') mine office. The clause beginning with "inasmuch" should be read as a parenthesis.