Caution — while θεόπνευστοι still spoke, written Scripture was not yet the full deposit
Take that with this caution: once the inspired men through whom revelation's light grew are gone, and their writings are out.
Except the time when their living voice still sounded in the Church, before they had put in writing what God was pleased to reveal to them anew. For example, when the Apostles began to preach and had not yet written anything, Old Testament Scripture did not hold all needful for salvation except in a mixed, implicit way — inasmuch as it sent us to the true Messiah, from whom we would be taught God's will more fully.
Latin
XXX. Id tamen intelligendum videtur cum hac cautione, nempe sublatis viris θεοπνεύστοις per quos crevit divinae revelationis lumen, & editis eorum scriptis. Ut excipiatur tempus quo viva vox eorum in Ecclesia resonabat, nec dum scriptis consignaverant quae Deo placitum erat de novo ipsis revelare. Nam, exempli gratia, quum Apostoli praedicare coeperunt, neque adhuc quicquam scripserant, Scriptura veteris Testamenti non continebat omnia ad salutem necessaria, nisi confuse & implicite, quatenus nos ad verum Messiam remittebat, a quo plenius de Dei voluntate edoceremur.