Dogmas and creeds generally, however, are as much a source of evil as of good, because in them the guiding vision is clouded owing to degeneration or suspension of critical thinking. If allegiance to creeds and dogmas has sometimes been good for  the individual or the community to which  he belongs, it has more often done harm. Though the mind and the heart are involved in allegiance to dogmas and creeds, both function in such cases under the serious handicap of suspension of critical thought. Hence dogmas and creeds do not contribute to unmixed good.
-Discourses 7th Ed. p353