Then, inasmuch as He too has fabricated a world out of some underlying material which is unbegotten, and unmade, and contemporaneous with God, just as Marcion holds of the Creator, you reduce this likewise to the dignity of that local space which has enclosed two gods, both God and matter.
Source, in full
Book I, Chapter XV.—The Lateness of the Revelation of Marcion’s God. The Question of the Place Occupied by the Rival Deities. Instead of Two Gods, Marcion Really (Although, as It Would Seem, Unconsciously) Had Nine Gods in His System.
Notes from Wikiquote
Compare Thomas Jefferson's letter to John Adams, Monticello, Aug. 15, 1820