7 Take care, Venerable Brethren, that above all, faith in God, the first and irreplaceable foundation of all religion, be preserved in Germany pure and unstained. The believer in God is not he who utters the name in his speech, but he for whom this sacred word stands for a true and worthy concept of the Divinity. Whoever identifies, by pantheistic confusion, God and the universe, by either lowering God to the dimensions of the world, or raising the world to the dimensions of God, is not a believer in God. Whoever follows that so-called pre-Christian Germanic conception of substituting a dark and impersonal destiny for the personal God, denies thereby the Wisdom and Providence of God who "Reacheth from end to end mightily, and ordereth all things sweetly" ( Wisdom viii. 1). Neither is he a believer in God.
Source: Mit Brennender Sorge (Vatican.va)