The fourth head deals with the fact that the Birth-day of Christ, which the catholic Church thinks highly of as the occasion of His taking on Him true man, because “the Word became flesh and dwelt in us,” is not truly honoured by these men, though they make a show of honouring it, for they fast on that day, as they do also on the Lord’s day, which is the day of Christ’s resurrection. No doubt they do this, because they do not believe that Christ the Lord was born in true man’s nature, but maintain that by a sort of illusion there was an appearance of what was not a reality, following the views of Cerdo and Marcion, and being in complete agreement with their kinsfolk, the