The keynote of the famous master’s teaching during those two years of his Roman imprisonment may be doubtless found in the letters written by him at that time. Three of these, the “Ephesian,” “Colossian,” and “Philippian” Epistles, were emphatically massive expositions of doctrine--especially that addressed to the Colossians. From these we can gather what was the principal subject-matter of the Pauline teaching at Rome. His thoughts were largely taken up with the great doctrinal questions bearing on the person of the Founder of Christianity. We will quote one or two passages from the great doctrinal Epistle to the Colossians as examples of the Pauline teaching at this juncture of his life when he was engaged in building up the Roman Church, and furnishing it with an arsenal of weapons which would soon be needed in _their_ life and death contest with the dangerous heresies[9] which so soon made their appearance in the city which was at once the metropolis of the Church and the Empire. “The Father, ... who hath translated us into the kingdom of His dear Son, ... who is the image of the invisible God, the first-born of every creature: for by Him were all things created, that are in heaven, and that are in earth, visible and invisible, whether they be thrones, or dominions, or principalities, or powers: all things were created by Him, and for Him: and He is before all things, and by Him all things consist. And He is the head of the body, the Church: who is the beginning, the first-born from the dead; that in all things he might have the pre-eminence. For it pleased the Father that in Him should all fulness dwell; and, having made peace through the blood of His Cross, by Him to reconcile all things unto Himself; by Him (I say), whether they be things in earth, or things in heaven” (Col. i. 12-20). And once more: “Beware lest any man spoil you through philosophy and vain deceit, after the tradition of men, ... and not after Christ. For in Him dwelleth all the fullness of the Godhead bodily. And ye are complete in Him, which is the head of all principality and power.” Preaching on such texts, which contain those tremendous truths which just at this time he embodied in his Colossian letter, did S. Paul lay the foundation of the “Christology” of the Church of Rome. With justice, then, was he ranked by the early Christian writers as one of the founders of the Roman Church, for he was without doubt the principal teacher of the famous congregation in the all-important doctrinal truths bearing on the person and office of Jesus Christ. S. Peter, whose yet earlier work at Rome, we believe, stretching over some eight or nine years, we have already dwelt on, was evidently absent from the capital when S. Paul in A.D. 58 wrote his famous Letter to the Romans; nor had he returned in A.D. 61, when Paul was brought to the metropolis as a prisoner; but that he returned to Rome somewhere about A.D. 63-4 is fairly certain.