10 Such men have strayed pathetically far from the teaching of Christ and the views expressed by the Apostle when he said, "Let us all attain to the unity of the faith and of the deep knowledge of the son of God... that we may no longer be children, tossed to and fro and carried about by every wind of doctrine devised in the wickedness of men, in craftiness, according to the wiles of error. Rather are we to practice the truth in love, and grow up in all things in him who is the head, Christ. For from him the whole body (being closely joined and knit together through every joint of the system according to the functioning in due measure of each single part) derives its increase to the building up of itself in love."(6)
Source: Ad Petri Cathedram (Vatican.va)