God the Father has reconciled His created but fallen world through the death of His Son, and renews it into a Kingdom of God by His Spirit.

It is completely incomprehensible to us how God can reveal himself and to some extent make himself known in created beings: eternity in time, immensity in space, infinity in finite, immutability in change, being in becoming, the all, as it were, in that which is nothing. This mystery cannot be comprehended it can only be gratefully acknowledged.

Mystery is the lifeblood of dogmatics.