Translated by Frederick Crombie.
2. If, then, they acquiesce in our assertion, which reason itself has demonstrated, regarding the nature of light, and acknowledge that God cannot be understood to be a body in the sense that light is, similar reasoning will hold true of the expression "a consuming fire." For what will God consume in respect of His being fire? Shall He be thought to consume material substance, as wood, or hay, or stubble? And what in this view can be called worthy of the glory of God, if He be a fire, consuming materials of that kind? But let us reflect that God does indeed consume and utterly destroy; that He consumes evil thoughts, wicked actions, and sinful desires, when they find their way into the minds of believers; and that, inhabiting along with His Son those souls which are rendered capable of receiving His word and wisdom, according to His own declaration, "I and the Father shall come, and We shall make our abode with him?"  He makes them, after all their vices and passions have been consumed, a holy temple, worthy of Himself. Those, moreover, who, on account of the expression "God is a Spirit," think that He is a body, are to be answered, I think, in the following manner. It is the custom of sacred Scripture, when it wishes to designate anything opposed to this gross and solid body, to call it spirit, as in the expression, "The letter killeth, but the spirit giveth life,"  where there can be no doubt that by "letter" are meant bodily things, and by "spirit" intellectual things, which we also term "spiritual." The apostle, moreover, says, "Even unto this day, when Moses is read, the veil is upon their heart: nevertheless, when it shall turn to the Lord, the veil shall be taken away: and where the Spirit of the Lord is, there is liberty."  For so long as any one is not converted to a spiritual understanding, a veil is placed over his heart, with which veil, i.e., a gross understanding, Scripture itself is said or thought to be covered: and this is the meaning of the statement that a veil was placed over the countenance of Moses when he spoke to the people, i.e., when the law was publicly read aloud. But if we turn to the Lord, where also is the word of God, and where the Holy Spirit reveals spiritual knowledge, then the veil is taken away, and with unveiled face we shall behold the glory of the Lord in the holy Scriptures.
 John xiv. 23.
 2 Cor. iii. 6.
 2 Cor. iii. 15-17.
Reference address : https://www.ellopos.net/elpenor/greek-texts/fathers/origen/principia.asp?pg=9