Another extract from Vincent of Lerins Commonitorium (not, I should add, with unqualified support and approval for everything he stands for in that book). But on the danger and deception of heresy he has this to say:"It was for this reason that the Saviour cried, 'Beware of false prophets who come to you in sheep's clothing, but inwardly they are ravening wolves.' What is meant by 'sheep's clothing'? What but the words which prophets and apostles with the guilelessness of sheep wove beforehand as fleeces, for that immaculate Lamb which taketh away the sin of the world ? What are the ravening wolves?
What but the savage and rabid glosses of heretics, who continually infest the Church's folds, and tear in pieces the flock of Christ wherever they are able ?