Do not believe what some pervert monks wrote about it as there is no evidence whatsoever who wrote or said such a thing. In this case why not believing the apocryphal Gospel of Jesus brother James who wrote that Jesus was a simple teacher, who was never deified, nor born of an immaculate conception, neither he resurrected? Doesn't actually Quran assert the same? The same we read in the Secret Apocalypse of Peter and the Secret book of John. As for the Son of God or the Son of Man, it was a phrase copied from Hermetism, mistranslated and incorporated by the priesthood into the Christian doctrine. There have been many falsifications in the scripts as the Catholic Church admits... read Encyclopedia Biblica, vol ii, p.1880, vol iii, pp.1767,1781 & Catholic Encyclopedia, vol iii ?The evidence of its spuriousness? & Catholic Encyclopedia, Farley ed. Vol iii pp.274-9, Canons.