It is on this account, as appears to me, that the Instructor does not permit us to give utterance to aught unseemly, fortifying us at an early stage against licentiousness. For He is admirable always at cutting out the roots of sins, such as, “Thou shalt not commit adultery,” by “Thou shalt not lust.” For adultery is the fruit of lust, which is the evil root. And so likewise also in this instance the Instructor censures licence in names, and thus cuts off the licentious intercourse of excess. For licence in names produces the desire of being indecorous in conduct; and the observance of modesty in names is a training in resistance to lasciviousness. We have shown in a more exhaustive treatise, that neither in the names nor in the members of intercourse and nuptial embraces, to which appellations not in common use are applied, is there the designation of what is really obscene.