Theology without practice is the theology of demons

When our intellect has shaken off its many opinions about created things, then the inner principle of truth appears clearly to it, providing it with a foundation of real knowledge and removing its former preconceptions as though removing scales from eyes, as happened in the case of St. Paul (cf. Acts 9:18). For an understanding of Scripture that does not go beyond the literal meaning, and a view of the sensible world that relies exclusively on sense perception, are indeed scales, blinding the soul's visionary faculty and preventing access to the pure Logos of truth.

If we keep the path of virtue undefiled through devout and true knowledge, and do not deviate to either side, we will experience the advent of God revealed to us because of our dispassion. For 'I will sing a psalm and in a pure path I will understand when Thou wilt come to me' (cf. Ps. 101:1-2). The psalm stands for virtuous conduct; understanding indicates the spiritual knowledge, gained through virtue, by means of which we perceive God's advent, when we wait for the Lord vigilant in the virtues.

There is a single energy of God and the saints? they are living icons of Christ, being the same as He is, by grace rather than by assimilation.

Without the power of intelligence there is no capacity for spiritual knowledge; and without spiritual knowledge we cannot have the faith from which springs that hope whereby we grasp things of the future as though they were present. Without the power of desire there is no longing, and so no love, which is the issue of longing; for the property of desire is to love something. And without the incensive power, intensifying the desire for union with what is loved, there can be no peace, for peace is truly the complete and undisturbed possession of what is desired.

Just as the teaching of the Law and the prophets, being harbingers of the coming advent of the Logos in the flesh, guide our souls to Christ (cf. Gal. 3:24), so the glorified incarnate Logos of God is Himself a harbinger of His spiritual advent, leading our souls forward by His own teachings to receive His divine and manifest advent. He does this ceaselessly, by means of the virtues converting those found worthy from the flesh to the spirit. And He will do it at the end of the age, making manifest what has hitherto been hidden from men.

If you expound the teaching of the Logos from the standpoint of the moral life, using materialistic words and examples which correspond to the capacity of your hearers, you make the Logos flesh. Conversely, if you elucidate mystical theology by means of the higher forms of contemplation you make the Logos spirit.