A Catholic Response to the New Age Phenomenon by the Irish Theological Commission in 1994. To see the contents of the whole chapter, click here . Christians have had to discern false prophets and teachers from the beginning of the Church.
False doctrine is nothing new.
Both Jesus himself, and the early Church teachers warned us of this. You must therefore be on your guard. I have forewarned you of everything'. Jesus laid down the principle that we would recognise them by their fruits. If they remove themselves from revealed truth, holiness, and obedience to God's will and word then do not follow them.