Origen of Alexandria, On First Principles 4
But since human senses and common understanding are not enough to commit the sum of the matter when discussing such great and important things -- so to speak, to pronounce visibly about invisible things -- we must also take up testimonies of divine Scripture for the proof of what we say. And so that these testimonies may have certain and undoubted faith, whether in the things that are to be said by us or in those already said, it seems necessary first to show that the divine Scriptures themselves are of God, that is, inspired by the Spirit of God.
Latin
1. Verum quoniam de tantis et talibus rebus disserentibus non suffieit humanis sensibus et communi intellectui summam rei committere et, ut ita dixerim, visibiliter de invisibilibus pronuntiare, assumenda sunt nobis ad probationem horum, quae dicimus, etiam divinarum scripturarum testimonia. Quae testimonia ut certam et indubitatam "tree d o habeant fidem sive in his, quae dicenda a nobis, sive quae iam dicta sunt, necessarium prius videtur ostendere quod ipsae scripturae divinae sint, id est dei spiritu inspiratae.