Deus honoratur silentio, non quod nihil de ipso dicatur vel inquiratur, sed quia quidquid de ipso dicamus vel inquiramus, intelligimus nos ab eius comprehensione defecisse.
"God is honored by silence, not in that we say or investigate nothing about Him, but because whatever we say or investigate about him, we understand that our comprehension of Him fails to be complete."
Super De Trin. de Boet. q. 2 a.1 ad 6