B. A. Mastin, in his article ‘A neglected feature of the christology of the Fourth Gospel’, points out ‘that in the construction of the Fourth Gospel prominence is given to the designation of Jesus as θεός. The Fourth Gospel appears to use the term θεός deliberately of Jesus; in “Paul”, on the other hand, the usage is much more casual, as indeed is the case in the rest of the New Testament, with the possible exception of Heb.i.8f'. Mastin demonstrates that Jn. 1. 1, 18 and 20. 28 speak of Jesus as God. ‘These three verses are placed at strategic points in the gospel, and this underlines the significance of what they say.’ Finally, Mastin states: ‘… it is reasonable to claim that the Evangelist thought it was important that the title θεός should be given to Jesus. It is probable that this feature of his christology is due to controversy with the Jews, and that as a result of this he formulated his estimate of Christ's person in this way.’ I fully agree with these results. The aim of my article is to show the scriptural background for this controversy.