Nitzsch on Trinity

Barth quotes one CJ Nitzsch on the significance of the doctrine of the Trinity: ?So long as theism only distinguishes God and the world and never God from God, it is always caught in a relapse or transition to the pantheistic or some other denial of absolute being. There can be full protection against atheism, polytheism, pantheism, or dualism only with the doctrine of the Trinity?EFaith in the eternal, holy love which God is can be achieved in both theory and practice only by knowledge of the perfect eternal object of the divine self-knowledge and love, i.e., by the thought of the Father?s love for the only-begotten Son. Finally the full quickening nature and impartation of God, which is neither a diminution nor a limitation of his being, can be safeguarded only by the Trinitarian doctrine of the Spirit.?E