This chapter is about the moon in the earth. And in particular, we're going to find the proportion of the size of the moon as compared to the earth in multiple diagrams. So let's start with a line segment, which I've already labeled A and B. I'm going to bisect that line segment to find the midpoint, which I'll label C. And then I'll just go ahead and draw a circle out from the center to the end. Then draw a perpendicular through C and label the top point D and then bisect CD. To find this point, he put a circle centered at E with a radius of Ed. Next, draw another circle from a and have it go perpendicular to that circle so that there's a point of point of tangency there Do the same thing on the other side.
I'll then identify that point at the top as point F. And finally draw a circle centered at F with the radius f d. So now, if that's the earth, then this would be the moon. Now there's nothing in physics which says that our planet and its natural satellite should have such pure geometric proportions, which can be identified with a simple diagram. But nevertheless, that is the case. It's really quite miraculous. And this is part of what makes sacred geometry sacred. It's this geometry.
This very simple, foundational geometry describes our planet, our bodies, even our DNA,