Paul was no advocate of an undogmatic religion; he was interested above everything else in the objective and universal truth of his message. . . . Paul was not interested merely in the ethical principles of Jesus; he was not interested merely in general principles of religion or of ethics. On the contrary, he was interested in the redeeming work of Christ and its effect upon us. His primary interest was in Christian doctrine, and Christian doctrine not merely in its presuppositions but at its center. If Christianity is to be made independent of doctrine, then Paulinism must be removed from Christianity root and branch. . . .
Many attempts have indeed been made to separate the religion of Paul sharply from that of the primitive Jerusalem Church; many attempts have been made to show that Paul introduced an entirely new principle into the Christian movement or even was the founder of a new religion.But all such attempts have resulted in failure. The Pauline Epistles themselves attest a fundamental unity of principle between Paul and the original companions of Jesus, and the whole early history of the Church becomes unintelligible except on the basis of such unity. Certainly with regard to the fundamentally doctrinal character of Christianity Paul was no innovator. The fact appears in the whole character of Paul’s relationship to the Jerusalem Church as it is attested by the Epistles, and it also appears with startling clearness in the precious passage in 1 Cor. 15:3-7, where Paul summarizes the tradition which he had received from the primitive Church. What is it that forms the content of that primitive teaching? Is it a general principle of the fatherliness of God or the brotherliness of man? Is it a vague admiration for the character of Jesus such as that which prevails in the modern Church? Nothing could be further from the fact. “Christ died for our sins,” said the primitive disciples, “according to the Scriptures; he was buried; he has been raised on the third day according to the Scriptures.” From the beginning, the Christian gospel, as indeed the name “gospel” or “good news” implies, consisted in an account of something that had happened. And from the beginning, the meaning of the happening was set forth; and when the meaning of the happening was set forth then there was Christian doctrine. “Christ died”—that is history; “Christ died for our sins”—that is doctrine. Without these two elements, joined in an absolutely indissoluble union, there is no Christianity.
Adapted from J. Gresham Machen, Christianity and Liberalism (Kindle Edition)