Today is the feast of St. Bonaventure of Bagnoregio, Doctor of the Church. From the Breviloquium:
Not only is Wisdom capable of knowing [all things]: it is the very principle of knowing. Therefore, it is called 'light,' as being the principle of knowing all that is known; 'mirror,' as being the principle of knowing all that is seen and approved; 'exemplar,' as being the principle of knowing all that is foreseen and disposed; 'book of life,' as being the principle of knowing all that is predestined and reprobated. For divine Wisdom is the 'book of life', considering things insofar as they return to God; the 'exemplar,' considering things as they proceed from God'; the 'mirror,' considering things as they follow their course; and the 'light,' from all these perspectives simultaneously. Now under the concept of 'exemplar,' we also use other terms, such as 'idea,' 'word,' 'art,' and 'reason.' 'Idea' refers to the act of foreseeing; 'word,' to the act of proposing; 'art,' to the act of accomplishing; and 'reason,' to the act of perfecting, for it adds the idea of a goal. Since all of these acts are in God, one is often taken for another.
[Bonaventure, Breviloquium, Monti, ed., The Franciscan Institute (Saint Bonaventure, NY: 2005), p. 50.]
