Reasons 8–9: from God who reveals; from prophets and Apostles as God's scribes
8. From God's side as Revealer. Either God could speak perspicuously, short of unavoidable obscurity, or he could not. If you say he could not, you speak falsely, because nothing here impedes his power (Exodus 4:11; Lactantius, Institutes book 6 chapter 21). Therefore he could. If he could, either he ought to speak perspicuously, or he ought not. That he ought not is hardly granted by his wisdom and goodness. If he ought, either he willed it, or he did not. That he did not is absurd, and it cries out against sacred Scripture's sayings and aim (Romans 15:4; 2 Timothy 3:15; John 5:39; 2 Peter 1:19). Therefore he willed it, and accordingly he spoke clearly — by the argument of Psalm 115:3.
9. From God's scribes — the prophets and Apostles. Either they could write clearly, or they could not. The latter is absurd, because those who before were rude and unlettered became lettered (Acts 4:13), and soon, moved by God's Spirit, spoke (2 Peter 1:21), knowing every tongue that was under heaven (Acts 2:8 and following). If they could, either they ought, or they ought not. That they ought not, the prophetic office and the apostleship do not permit (Romans 15:4; John 20:31; 1 John 2:3); hence they are called the light of the world (Matthew 5:14; Acts 13:46). If they ought, either they willed, or they refused. Not the latter — by the argument of Acts 4:20. Therefore they willed, and accordingly they wrote with the sun's ray, however much Scripture-shunners deny it — as Tertullian (On the resurrection of the flesh chapter 47) names such people.
Latin
8. Ex parte DEI revelantis. Aut enim potuit Deus perspicue, citra invincibilem obscuritatem, loqui, aut non potuit. Si dicas non potuisse, falsum dicis, quia potentiae hic nullum impedimentum est, Exod. 4.11. Lactantius lib.6. Instit. c.21. Ergo potuit. Si vero potuit, aut debuit perspicue loqui, aut non debuit. Non debuisse, per sapientiam & bonitatem ipsius haud conceditur. Si debuit, aut voluit, aut non voluit. Hoc vero absurdum est & reclamat dictis & scopo s. scripturae, Rom. 15.4. 2 Tim. 3.15. Joh. 5.39. 2. Petr. 1.19. Voluit igitur, perindeque clare locutus est, argumento psal. 115.3. 9. Ex parte actuariorum Dei, prophetarum & Apostolorum. Hi enim aut potuerunt clare scribere aut non potuerunt. Posterius absonum est, quia qui ante erant rudes & illiterati, literati, Act. 4.13. mox a Dei spiritu acti locuti sunt, 2. Pet. 1.21. omnium linguarum, quae sub coelo erant, gnari, Act. 2.8. &c. Si potuerunt, aut debuerunt aut non debuerunt. Non debuisse, Propheticum munus & Apostolatus non permittit, Rom. 15.4. Joh. 20.31. 1. Joh. 2.3. unde lux mundi dicuntur, Matth. 5.14. Act. 13.46. Si debuerunt, aut voluerunt aut noluerunt. Non hoc, argumento Act. 4.20. Ergo voluerunt ac proinde solis radio scripserunt, quantumvis scripturae lucifugae id negitent, ut Tertullianus hos tales appellat lib. de resurrectione carnis c.47.