"...concerning his Son, who was descended from David according to the flesh and was declared to be the Son of God in power according to the Spirit of holiness by his resurrection from the dead, Jesus Christ our Lord... (Romans 1:3-4 ESV)
"The first point which we have to make is that the gospel is concerning God's Son. That is the nerve, the heart and the very centre of the gospel. There is no such thing as the Christian gospel, and there is no such thing as Christianity, apart from Him. Christianity, by definition, is Christ Himself. Now this is something, it seems to me, as one sees so clearly in the New Testament, about which there can be no discussion or argument whatsoever. There is no such thing as Christianity apart from the Person of our Lord and Saviour Jesus Christ. That does not mean that the Lord Jesus Christ is a 'bearer' of good news from God. No! It means that He Himself is the good news. It is the Person and what the Person has done. It is not merely that He is one of a great series of prophets and of teachers who have been raised up by God. No! There is an absolute uniqueness here-- He Himself. And He Himself is absolutely vital, and must always be central and in the most prominent position.
"Now that is what constitutes the whole uniqueness of the Christian gospel. Take any religion that you like; you will generally find a man's name associated with it; but in none of these can it be said that the particular man is absolutely essential. You have Buddhism, but you can Buddhism without Buddha. You have Confucianism, but you can have Confucianism without Confucius. It is more or less and accident that a particular man happens to put forward the teaching, but the man himself is not essential to the teaching; what is vital in all these religions is the particular teaching. But here, when you come to the realm of the Christian faith, the whole position is absolutely different. Take away the Person and there is no message at all. There is no teaching. There is nothing. The connection, in other words, between our Lord Himself, as a Person, and Christianity is obviously something which is of central significance."
~ Martyn Lloyd-Jones, Romans: The Gospel of God, Vol. 1 (Zondervan, 1985) pp. 98-99.
Hear Lloyd-Jones' sermons on Romans which he gave from 1955--1968 at Westminster Chapel in London. Free, courtesy of the MLJ Trust.