Eyesight Should Learn From Reason.

If The Earth Were Not Round, Heavy Bodies Would Not Tend From Every Side In A Straight Line Towards The Center Of The Earth, But To Different Points From Different Sides.

I Used To Measure The Heavens, Now I Measure The Shadows Of Earth. The Mind Belonged To Heaven, The Body's Shadow Lies Here.

My Greatest Desire Is That I May Perceive The God Whom I Find Everywhere In The External World, In Like Manner Also Within And Inside Myself.

So, Fabricius, I Already Have This: That The Most True Path Of The Planet [mars] Is An Ellipse, Which Dürer Also Calls An Oval, Or Certainly So Close To An Ellipse That The Difference Is Insensible.

Planets Move In Ellipses With The Sun At One Focus.