It has been among my greatest Pleasures to teach the ancient Subjects of Mathematics and Natural Philosophy to a new Generation of Scholars, and in so doing, continue the unbroken Enterprise of giving to the Future the immense Treasure that has been received from the Past.

So, Martin, Bryan, Sarah, Owen, Justin, Chris, Elizabeth, Matt, Nate, Shana, Ben, Hannah, Zach, David, Katherine, Carina, Jesse and all the others; and Ellen, Greg and Jeff; and all my own teachers; and Lisa: this book is dedicated to you.

I believe that, if there was no other proof, that because of Mathematics, I would still believe in God. I’ll let Leonhard tell you why.