John 4:24

Fragments from the Lost Writings of Irenaeus

but they are according to the Spirit, for we must worship God "in spirit and in truth."[78]

Address of Tatian to the Greeks

He alone is without beginning, and He Himself is the beginning of all things. God is a Spirit,[8]

Tertullian Against Hermogenes

on the ground that "God is a Spirit,"[338]

Tertullian On the Resurrection of the Flesh

as being more proximate in character to God.[57]

Tertullian Against Praxeas

In what form of God? Of course he means in some form, not in none. For who will deny that God is a body, although "God is a Spirit? "[78]

Origen de Principiis Book I

and in the Gospel according to John, that "God is a Spirit, and they who worship Him must worship Him in spirit and in truth."[2]

Origen Against Celsus Book II

and in another, "God is a Spirit, and they that worship Him must worship Him in spirit and in truth."[193]

A Treatise of Novatian Concerning the Trinity

and gave the reasons, saying, "God is a Spirit; and those therefore who worship, must worship in spirit and in truth."[34]

Pseudo-Gregory Thaumaturgus A Sectional Confession of Faith

And again, if the impious say, How will there not be three Gods and three Persons, on the supposition that they have one and the same divinity?-we shall reply: Just because God is the Cause and Father of the Son; and this Son is the image and offspring of the Father, and not His brother; and the Spirit in like manner is the Spirit of God, as it is written, "God is a Spirit."[42]

Pseudo-Gregory Thaumaturgus A Sectional Confession of Faith

For thus the Father is Lord, and the Son also is God; and of God it is said that "God is a Spirit."[64]

Dionysius Extant Fragments Part I

Since, then, God is the Light, Christ is the Brightness. And since He is a Spirit-for says He, "God is a Spirit"[114]