God’s house is the whole world; God’s house is the Catholic Church; God’s house is also every faithful soul.
But God inhabits the world in one way, the Church in another, and every faithful soul in yet a third.
He is in the world as ruler of His kingdom; He is in the Church as head of the family in His own home; He is in the soul as the bridegroom in the wedding-chamber.
The heathen and the unbelievers are all of them in His house that is, in His kingdom; for through the power of His Godhead He maintains and governs all that He has made.
False believers are in His house that is, in the Church; for He entrusts participation in His mysteries to all whom He has called to faith.
But the truly faithful are in His house, or rather I should say they are His house, because by dwelling in them through love He owns and rules them.
We are all in His house by our very created condition. We are in His house through the faith whereby He called us. We are in His house through the love whereby He justified us.
If you are in the house of God by your origin only, the devil is there too along with you.
If you are in the house of God by faith, there is still chaff on your threshing-floor together with the wheat.
But if you are in the house of God through love, blessed are you, for not only are you in the house of God, but you yourself have begun to be His house, to the intent that He who made you may also dwell in you.
This is the abode of health, these are the dwellings of the righteous through which the voice of joy and exultation [Cf. Ps. 118, 15] ever rings, wherein the blessed dwell.
Of this, the prophet longed to see the beauty, in it he yearned to dwell, he was on fire with desire for it [Cf. Ps. 84, 2].
If then this dwelling has begun to be in us, let us go in and abide with Him. There, where He ‘whose place is in peace’ [Ps. 76, 2] deigns to make His dwelling, we shall find peace and rest.
But if it has not yet begun to be in us, then let us build it; for, if we have prepared a place for Him, He will gladly come to us who made us that He might dwell in us, even Jesus Christ our Lord.
Hugh of St Victor (c.1096-1141): On the Moral Interpretation of the Ark of Noah, 3 @ Fr Luke Dysinger, OSB.