Origen

“ God is a Spirit; and they that worship Him must worship Him in spirit and in truth.” [9] And by these words He taught men that God must be worshipped not in the flesh, and with fleshly sacrifices, but in the spirit. And He will be understood to be a Spirit in proportion as the worship rendered to Him is rendered in spirit, and with understanding. ”

“ Nor is the Spirit, in our opinion, a “body,” any more than fire is a “body,” which God is said to be in the passage, “Our God is a consuming fire.” [2] For all these are figurative expressions, employed to denote the nature of “intelligent beings” by means of familiar and corporeal terms. In the same way, too, if sins are called “wood, and straw, and stubble,” we shall not maintain that sins are corporeal ”