Clement of Alexandria Stromata Book I and not yet acquainted with the word, according to which he has believed and works, and not able to give a reason in himself. "Prove all things," the apostle says, "and hold fast that which is good,"[139] Tertullian The Prescription Against Heretics who exchange their creed for heresy; although they contrariously interpret his words to their own side, when he says in another passage, "Prove all things; hold fast that which is good; "[41] Tertullian On the Veiling of Virgins Let that, accordingly, be to you Scripture, and Nature, and Discipline, which you shall find to have been sanctioned by God; just as you are bidden to "examine all things, and diligently follow whatever is better."[57] Dionysius Extant Fragments Part II I received this vision as being what was in accordance with the apostolic word, which thus urges all who are endowed with greater virtue, "Be ye skilful money-changers."[68]