I thank my God through Jesus Christ. — How can the Apostle be said to thank God through Jesus Christ? Christ is, as it were, the medium through whom God has been brought into close relation to man. Hence all intercourse between God and man is represented as passing through Him. He is not only the divine Logos by whom God is revealed to man, but He is also the Head of humanity by whom the tribute of thanks and praise is offered to God.
Throughout the whole world. — A hyperbole, which is the more natural as the Apostle is speaking of Rome, the centre and metropolis of the world as he knew it.