Pascendi Dominici Gregis §5

⁵ To proceed in an orderly manner in this recondite subject, it must first of all be noted that every Modernist sustains and comprises within himself many personalities; he is a philosopher, a believer, a theologian, an historian, a critic, an apologist, a reformer. These roles must be clearly distinguished from one another by all who would accurately know their system and thoroughly comprehend the principles and the consequences of their doctrines.