ABSTRACT
Jaime Ferreira argues that some thinkers, like Paul Tillich, see faith and doubt as compatible but devalue the need for rational criticism, while others, like Newman, hold that faith and doubt are incompatible, but affirm the need and importance of rational criticism. The primary objective of this chapter will be to investigate the role which rational criticism plays in the assent of Catholic Divine Faith. One of the main forms of rational criticism which Newman maintains is compatible with the assent of Catholic Divine Faith is investigation. Investigation, for Newman, is the rational process of examining the grounds for the truth of a proposition to which we are giving assent. In the Grammar of Assent, Newman suggests that investigation is compatible with Catholic Divine Faith when he distinguishes between investigation, which does not imply doubt, and inquiry, which does imply doubt, and condemns inquiry as being incompatible with Catholic Faith, because it implies doubt.
