The Father’s purpose in revealing the Son was to make himself known to us all and so to welcome into eternal rest those who believe in him, establishing them in justice, preserving them from death. To believe in him means to do his will… The Son performs everything as a ministry to the Father, from beginning to end, and without the Son no one can know God. The way to know the Father is the Son. Knowledge of the Son is in the Father, and is revealed through the Son. For this reason the Lord said: No one knows the Son except the Father; and no one knows the Father except the Son, and those to whom the Son has revealed him.