In the Middle Ages, in the Dark Ages, in the 1300s, 1400s, really truth is set by the Catholic Church. The Catholic Church determines that, for instance, we are a geocentric universe. Geo, geography of Earth, center of the universe. That Earth was the center of the universe and the sun revolved around Earth. And of course, this is kind of metamorphic, metamorphical too, you know, the idea that we're the center of the universe, that we know everything, everything revolves around us. Whereas when, you know, we come up with the heliocentric principle, and we'll go into that in a second, you know, now we're not the center of the universe. Now we have to figure out where are we in relationship to the universe around us.