"The word ‘religious’ acquires a precise meaning only when it is associated with a distinct and definite form through which the concept is put into practice. To say that a person is ‘deeply religious’ may be very fine phraseology; but, generally speaking, it tells us little or nothing. There may be some few people who are content with such a vague description and there may even be some to whom the word conveys a more or less definite picture of the inner quality of a person thus described. But, since the masses of the people are not composed of philosophers or saints, such a vague religious idea will mean for them nothing else than to justify each individual in thinking and acting according to his own bent. It will not lead to that practical faith into which the inner religious yearning is transformed only when it leaves the sphere of general metaphysical ideas and is moulded to a definite dogmatic belief."
January 1, 1970
https://en.wikiquote.org/wiki/Mein_Kampf