The Spirit Of Knowledge

Ἐπειδὴ δὲ διὰ δυνάμεως φωτιστικῆς τῷ κάλλει τῆς τοῦ Θεοῦ τοῦ ἀοράτου εἰκόνος ἐνατενίζομεν, καὶ δι΄αὐτῆς ἀναγόμεθα ἐπὶ τὸ ὑπέρκαλον τοῦ ἀρχετύπου θέαμα αὐτοῦ που πάρεστιν ἀχωρίστως τὸ τῆς γνώσεως Πνεῦμα τὴν ἐποπτικὴν τῆς εἰκόνος δύναμιν ἐν ἑαυτῷ παρεχόμενον τοῖς τῆς ἀληθείας φιλοθεάμοσιν, οὐκ ἔξωθεν τὴν δεῖξιν ποιούμενον ἀλλ΄ ἐν ἑαυτῷ εἰσάγον πρὸς τὴν ἐπίγνωσιν. Ὡς γὰρ οὐδεὶς οἶδε τὸν Πατέρα εἰ μὴ ὁ Υἱός οὕτως οὐδεὶς δύναται εἰπεῖν Κύριον Ἰησοῦν εἰ μὴ ἐν Πνεύματι ἁγίῳ. Οὐ γὰρ διὰ Πνεύματος εἴρηται ἀλλ΄ ἐν Πνεύματι. Καὶ Πνεῦμα ὁ Θεός καὶ τοὺς προσκυνοῦντας αὐτὸν ἐν Πνεύματι καὶ ἀληθείᾳ δεῖ προσκυνεῖν· καθὼς γέγραπται· Ἐν τῷ φωτί σου ὀψόμεθα φῶς τουτέστιν ἐν τῷ φωτισμῷ τοῦ Πνεύματος φῶς τὸ ἀληθινόν ὃ φωτίζει πάντα ἄνθρωπον ἐρχόμενον εἰς τὸν κόσμον. Ὥστε ἐν ἑαυτῷ δείκνυσι τὴν δόξαν τοῦ Μονογενοῦς καὶ τοῖς ἀληθινοῖς προσκυνηταῖς ἐν ἑαυτῷ τὴν τοῦ Θεοῦ γνῶσιν παρέχεται. Ἡ τοίνυν ὁδὸς τῆς θεογνωσίας ἐστὶν ἀπὸ ἑνὸς Πνεύματος διὰ τοῦ ἑνὸς Υἱοῦ ἐπὶ τὸν ἕνα Πατέρα. Καὶ ἀνάπαλιν ἡ φυσικὴ ἀγαθότης καὶ ὁ κατὰ φύσιν ἁγιασμός καὶ τὸ βασιλικὸν ἀξίωμα ἐκ Πατρός διὰ τοῦ Μονογενοῦς ἐπὶ τὸ Πνεῦμα διήκει. Ἅγιος Βασίλειος ὁ Μέγας, Περί Του Ἅγίου Πνεύματος Source: Migne PG 32.153a-b

And since by the power that enlightens we behold the beauty of the image of the invisible God, and by this image we are led up to the supreme beauty of the vision of the archetype, there is with us inseparably the Spirit of knowledge, in Himself supplying those who love the vision of the truth with the power of beholding the image, not making the revelation from without, but in Himself leading on to knowledge. For as 'No man knows the Father but the Son,' 1 so 'no man can say that Jesus is the Lord if not in the Holy Spirit.' 2 For it is not said through the Spirit, but in the Spirit. And 'God is a spirit, and they must worship Him in spirit and in truth.' 3 As it is written 'in your light we shall see light,' 4 that is, by the illumination of the Spirit, 'the true light which lights every man, coming into the world.' 5 Thus in Himself He shows the glory of the Only Begotten, and on true worshipers He supplies in Himself the knowledge of God. Therefore the way of the knowledge of God is from One Spirit through the One Son to the One Father. And conversely the natural Goodness and the inherent Holiness and the royal Dignity extend from the Father through the Only Begotten to the Spirit. Saint Basil of Caesarea, On The Holy Spirit 1 Mt 11.27 2 1 Cor 12.3 3 Jn 4.24 4 Ps 35.10 5 Jn 1.9