As Christians, it is our responsibility to
bear witness to the truth about marriage as taught by both revelation and reason — by the Holy Scriptures and by the truths inscribed on the human heart.
Whereas almost all earlier philosophers had assumed that the ground of
truth lay outside themselves, and so had believed philosophy
to be the art of making their concepts and words conform
to the many ways in which being
bore witness to itself, Descartes» method gave priority
to a moment of radical doubt
about everything outside the self.