Tertullian

“ I must not omit an account of the conduct [1] also of the heretics—how frivolous it is, how worldly, how merely human, without seriousness, without authority, without discipline, as suits their creed. To begin with, it is doubtful who is a catechumen, and who a believer; they have all access alike, they hear alike, they pray alike—even heathens, if any such happen to come among them. “That which is holy they will cast to the dogs, and their pearls,” although (to be sure) they are not real ones, “they will fling to the swine.” ”

“ Peace also they huddle up [4] anyhow with all comers; for it matters not to them, however different be their treatment of subjects, provided only they can conspire together to storm the citadel of the one only Truth. All are puffed up, all offer you knowledge. Their catechumens are perfect before they are full-taught. ”