The Pillar Of Cloud

Ἐν στύλῳ νεφέλης ἐλάλει πρὸς αὐτούς ἐφύλασσον τὰ μαρτύρια αὐτοῦ καὶ τὰ προστάγματα ἃ ἔδωκεν αὐτοῖς Ἐπεὶ ὁ τοῦ Θεοῦ λόγος βέβαιος καὶ ἀκλινής ἐστι, στύλος εἰκότως καλεῖται, ὡς τὴν καταδεξαμένην αὐτὸν Ἐκκλησίαν, στύλον καὶ ἐδραίωμα τῆς ἀληθείας εἶναι. Ἀλλ' ἐπει καὶ πότιμος καὶ καρπῶν αἰτιός ἐστιν, ὑετοῦ δίκην, εἰς τὰκ διανοίας τῶν ἀνθρώπων ἐρχόμενος, στύλος νεφέλης ἐστι. Τάχα δὲ καὶ προεθεσπίζετο διὰ τούτου ἡ τοῦ Σωτῆρος δεῦρο κάθοδος, καθ' ἤν ἐπιβὰς κούφης νεφέλης, εἰς Αἴγυπτον ἦκε τὸν περὶ γὴν τόπον. Τελείου δὲ ἀνδρὸς καὶ ἔχοντος πάσας τὰς ἀρετὰς, τὸ πάντα τὰ μαρτύρια καὶ προστάγματα τοῦ Θεοῦ φυλάττειν. Δίδυμος Αλεξανδρεύς, Εἰς Ψαλμούς, Ψαλμος ϟΗ' Source: Migne PG 39.1513a-b

In a pillar of cloud He spoke to them. They kept His testimonies and the commandments He gave to them. 1 Since the word of God is secure and unshaken, it is rightly called a pillar, which the Church receives as a pillar and support of truth. And since it is drinkable, a cause of fruitfulness, and comes as rain to water the minds of men, so it is called a column of cloud. And perhaps it hints at the Saviour's coming to earth, since He who came as a light cloud to Egypt, so came to a place of the earth. The perfect man is he who, guarding the testimonies and commandments of God, is adorned with every virtue. Didymus the Blind, On The Psalms, from Psalm 98 1 Ps 98.7