"Philosophical classifications are not like labels for political parties that people officially join; at best, they point to a salient feature that systems that differ in many other ways have in common. Such groupings fail to rise to the level of natural kinds; they are closer to what Wittgenstein thought of as concepts based upon family resemblances. They should be understood as handy devices for abbreviated referenced rather than as the product of a deep analysis of a philosophical tendency.
Charles Landesman, Skepticism – The Central Issues, 2.
"This picture establishes the direct relationship between vision and knowledge for which the Dominican Aquinas had argued in his Summa Theologica. Just as we still use the phrase "I see" to mean "I understand," For Aquinas the word visio meant more than just vision. "This term," he writes, "in view of the special nature and certitude of sight, is extended in common usage to the knowledge of all the senses and it is even made to include intellectual knowledge, as in Matthew 5:8: ‘Blessed are the pure in heart, for they shall see God.’" The Pisa altarpiece, like most Gothic images, was not considered primarily as a work of art by its contemporaries, but as something far more powerful and instrumental, because of its capacity not just to reflect the world, but to reshape it in God’s image."
-Michael Camille, Gothic Art – Glorious Visions, 25.