When Isaiah says "it's snakes, all the way down", he makes reference to the World Turtle (also known as the Cosmic Turtle), from the mythologies of Hindu, Chines and American indigenous cultures, wherein the world is supported on the back of a giant tortoise or turtle, which itself stands on the back of another larger turtle, which stands on the back of another even larger turtle, ad infinitum, hence the saying "it's turtles, all the way down". This is regarded as a an expression of infinite regress.