Bartholomew's Saying

Οὕτω γοῦν ὁ θεῖος Βαρθολομαῖός φησι, καὶ πολλὴν τὴν θεολογίαν εἶναι καὶ ἐλαχίστην· καὶ τὸ Εὐαγγέλιον πλατὺ καὶ μέγα, και αὖθις συντετμημένον. Διονύσιος ὁ Ἀρεοπαγίτης, Περὶ Μυστικῆς Θεολογίας, Κεφάλαιον Α' Source: Migne PG 3.999b

The blessed Bartholomew says that theology is both vast and small, and that the Gospel is great and broad, and again concise. Dionysius The Aeropagite, Mystical Theology, Chapter 1