Rationalism went hand-in-hand with an ocularcentric view of the world, largely created by Leon Battista Alberti (1404–1472), who developed our modern concept of perspective. Consider also how our language privileges sight. An “eyewitness” is to be trusted, whereas conversations merely “overheard” are suspect. We know that “seeing is believing” and use the phrase “I see” to denote understanding. As McLuhan noted, our wisest thinkers are called “visionaries” or “seers”.