{God speaking to Symeon the New Theologian in a vision:}
... according to the nature which is Mine, I am altogether invisible, uncircumscribed, formless, intangible, impalpable, immoveable, ever-moving, filling all things while altogether nowhere at all, not in you, not in any of the angels or prophets who have approached Me of old or who now draw near, by whom I have never been seen at all, nor am seen now.
("On the Mystical Life (Vol. 2)", p. 107)
In all other cases the same name or comparison is attributed to each Person by Himself as well as to all Three together. So, if you speak of "light", then both each Person is light and the Three are one light; if you speak of "eteranl life," so each of Them is likewise, the Son, the Spirit, and the Father, and the Three are one life. So God the Father is Spirit (cf. Jn. 4:24), and the Spirit is the Lord (2 Cor. 3:17), and the Holy Spirit is God. Each Person is God by Himself, and together the Three are one God. Each One is Lord and the Three are Lord. There is one God who is above all (Rom. 9:5), Creator of all things; each One is that by Himself, and they are one God and Maker of all things.
("Symeon the New Theologian: The Discourses", p. 344)
God without beginning, without end, unapproachable,unsearchable, invisible, ineffable, intangible, untouchable, dispassionate, inexpressible, has appeared to us in these last days in the flesh through His Son, has, we believe, been made known to us through His all-Holy Spirit as like us in every way save sin, has mingled Himself with a rational soul... for the sake of my soul in order to save my spirit and make my flesh immortal.
("On the Mystical Life (Vol. 2)", pp. 68-69)
The Son of God alone is both God and man, was and is alone holy -- as He shall be forever -- alone is righteous, alone true, alone immortal, alone the lover of mankind, alone merciful and compassionate, alone sovereign, alone light of the world, He Who is the light unapproachable.
("On the Mystical Life (Vol. 2)", p. 169)