If, then, thou art aware of these things being done, keep not silence, but oppose them urgently; since, if perchance thou shouldest neglect them, or conceal them when known of, the chain of sin will bind not those alone who do such things, but no light guilt before God will touch thee also in the matter. If, then, anything of the kind is committed, it ought to be restrained by canonical punishment, lest so great a wickedness, with sin in others, acquire strength from connivance.