In the kingdom of the Son the Father also reigns; and in the kingdom of the Father the Son also reigns: for the Father is in the Son, and the Son is in the Father; and in whomsoever the Son dwells, in him also the Father; and in whomsoever the Father dwells, in him also the Son dwells, as it is written: "Both I am My Father will come to Him, and make Our abode with Him." Thus as there is one dwelling, so also there is one kingdom. Yea, and so far is the kingdom of the Father and of the Son but one, that the Father receives what the Son delivers, and the Son does not lose what the Father receives.
St. Ambrose: On the Faith.
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