Jesus was not a Christian
Many persons hold up their hands in amazement at our assertion that Jesus was not a Christian, while we in turn regard it as the very height of blasphemy to say that He was a Christian. ‘Christianity,’ to us, is a way of getting rid of sin; and therefore to say that Jesus was a Christian would be to deny His holiness.
‘But,’ it is said, ‘do you mean to tell us that if a man lives a life like the life of Jesus but rejects the doctrine of the redeeming work of Christ in His death and resurrection, he is not a Christian?’ The answer is very simple. Of course if a man lives a life like the life of Jesus, all is well; such a man is indeed not a Christian — he is a being who has never lost his high estate of sonship with God.
But our trouble is that our lives do not seem to be like the life of Jesus. Unlike Jesus, we are sinners, and hence, unlike Him, we become Christians; we are sinners, and hence we accept with thankfulness the redeeming love of the Lord Jesus Christ, who had pity on us and made us right with God, through no merit of our own, by His atoning death.
— J. Gresham Machen What Is Faith?(Edinburgh: Banner of Truth, 1991), 110-11
Quoted in Of First Importance internet site