Necessity, certainty and illumination according to Saint Bonaventure.

Abstract

During the 13th century, several scholastic authors adopted Aristotelian theories to explain human knowledge. These theories assume that man is capable of acquiring science by using his natural powers. Our soul is able to grasp the essence of things by obtaining a knowledge that is certain about them. Yet, many of these authors believed that even admitting those theories, God’s assistance could not be dispensed with in order to explain the acquisition of scientific knowledge. This paper examines the reasons that led these authors to such a position. The analysis of several texts by St. Bonaventure allows one to understand what the doctrine of divine illumination aims to explain : namely that we can obtain certainty in spite of the fact that created things only possess a “conditional necessity”. Indeed, even the essence of created things would not have the minimum level of necessity that is required to be the foundation of the absolute certainty presupposed in the medieval concept of Scientia.