Cap. VI Arg. 10 close: same against Arminians — no easy ratio of elect and rejected
What Catholics once rightly said against the Semi-Pelagians, we turn on Arminians who ground election in foresight of faith and final perseverance: if so, you have comprehended God's inscrutable judgments. We, believing and showing those judgments incomprehensible, say that from one mass of perdition some are saved by God's goodness and grace, others left by just and hidden judgment (Peter the Deacon, On the Incarnation 7). Reject, then, all who give so easy a short-cut reason of elect and rejected — a reason neither the orthodox Fathers nor the Apostle himself, caught up to the third heaven, could give.
Latin
Quod itaque a Catholicis olim contra Semipelagianos recte dictum fuit, idem nos in Arminianos electionem ex praevisione fidei et finalis perseverantiae statuentes torquemus: Haec si ita sint, comprehensa sunt a vobis inscrutabilia judicia Dei, etc. Nos autem incomprehensibilia credentes et demonstrantes judicia Dei, ex una massa perditionis alios salvari dicimus bonitate et gratia Dei, alios justo et occulto judicio derelinqui, Petr. Diac. De Incarn. cap. 7. Est ergo rejicienda illorum omnium sententia, qui tam facili compendio rationem reddunt electorum et rejectorum, quam neque orthodoxi Patres, nec ipse Apostolus in tertium caelum raptus reddere potuit.