O blessed ones, grieve not the Holy Spirit, who has entered with you into the prison; for if He had not gone with you there, you would not be there to-day. Therefore endeavor to cause Him to remain with you there; so that He may lead you thence to the Lord. The prison, truly, is the devil’s house as well, wherein he keeps his family.… Let him not be successful in his own kingdom by setting you at variance with one another, but let him find you armed and fortified with concord; for your peace is war with him. Some, not able to find peace in the Church, have been accustomed to seek it from the imprisoned martyrs. Therefore you ought to have it dwelling with you, and to cherish it and guard it, that you may be able, perchance, to bestow it upon others. (_f_) Tertullian, _De Pudicitia_, 19. (MSL, 2:1073.) The distinction between mortal and venial sins became of great importance in the administration of penance and remained as a feature of ecclesiastical discipline from the time of Tertullian. The origin of the distinction was still earlier. See above, an extract from the same work. We ourselves do not forget the distinction between sins, which was the starting-point of our discussion. And this, too, for John has sanctioned it [_cf._ I John 5:16], because there are some sins of daily committal to which we are all liable; for who is free from the accident of being angry unjustly and after sunset; or even of using bodily violence; or easily speaking evil; or rashly swearing; or forfeiting his plighted word; or lying from bashfulness or necessity? In business, in official duties, in trade, in food, in sight, in hearing, by how great temptations are we assailed! So that if there were no pardon for such simple sins as these, salvation would be unattainable by any. Of these, then, there will be pardon through the successful Intercessor with the Father, Christ. But there are other sins wholly different from these, graver and more destructive, such as are incapable of pardon—murder, idolatry, fraud, apostasy, blasphemy, and, of course, adultery and fornication and whatever other violation of the temple of God there may be. For these Christ will no more be the successful Intercessor; these will not at all be committed by any one who has been born of God, for he will cease to be the son of God if he commit them. § 43. The Catechetical School of Alexandria: Clement and Origen