Leonard Susskind is a Nobel Prize winning physicist who lectures at Stanford University, and he recently gave a talk on the topic of "permanence and penetrability." In it, Leonard discusses how the Mathematical Universe Theory, which postulates that all elementary particles are imbued with eternal mathematical properties, could shed light on questions about the fundamental nature of Reality. Leonard also talks about his controversial opinion that the pornographers are "penetrabler" than scientists, and offers his thoughts on how we should approach the challenge of uncovering the deepest mysteries of existence.