Bonaventure
Medieval
c. A.D. 1221–1274
“"In the treasures of wisdom is understanding." This is to say that the hidden treasures of knowledge either consist in the knowledge of the highest causes, or of conclusions, or of principles. And one must dig through the study of truth so that a person may arrive at this treasure. This understanding, which is the gateway of scientific considerations, is partly from the dictate of nature, that is, from the interior light; partly from the frequency of experience, as from the exterior light; and partly from the illumination of the eternal light, as from the superior light.”