Against the papal first principle: whatever the Roman pontiff determines is not primary, for they prove it from Scripture
Reason 1 compares our principle with the papal party's first claim: Whatever the Roman pontiff determines is infallibly true. Bellarmine and the other Jesuits treat that claim as the only principle. Whatever authority others in the papal Catholic Roman Church still distribute, the Jesuits today gather onto one Pontiff alone.
Yet that claim cannot stand first. They themselves try to prove it from elsewhere — from Sacred Scripture (Matthew 16:18; John 21:15-John 21:17; Matthew 10:2); they ground tradition on John 16:12, 1 Corinthians 11:23, 2 Thessalonians 2:2 and 2 Thessalonians 2:15; and they ground the Church or bishops in a universal council on Matthew 23:2, Matthew 28:20, and Luke 10:16. Clearer than day, then: their slogans — Whatever the Roman pontiff, traditions, Church, or council hand down is infallibly true — are dragged back to our principle as something prior, though by a false reading, and so cannot be first.
Latin
Ratio 1. est a comparatione cum primo Pontificiorum principio, quod hoc est: Quicquid Romanus pontifex determinat, id infallibiliter verum est. Et vero ex sententia Bellarmini, aliorumque Jesuitarum, id solum est. Quicquid enim ab aliis in papatu Catholicae Romanae Ecclesiae authoritatis tribuitur, id totum in unum Pontificem a Jesuitis hodie transcribitur. Primum autem esse non posse, patet ex eo, quod aliunde id probare conantur, nimirum e sacra Scriptura, Matth. 16.v.18. Joh. 21.v.15.16.17. Matth. 10.v.2. sic traditionum suarum authoritatem probant ex Joh. 16.v.12. 1.Cor. 11.v.23. 2.Thess. 2.2. & 15. Sic authoritatem Ecclesiae seu Episcoporum in universali concilio congregatorum e Matth. 23.v.2. & 28.v.20. Luc. 10.v.16. Ex quibus luce clarius est, haec Pontificiorum principia: Quicquid Romanus pontifex, traditiones, Ecclesia, concilium tradunt, id infallibiliter verum est: ad nostrum principium supra positum tanquam prius ab ipsis, quamvis per falsam interpretationem, reduci, ideoque prima esse non posse.