At Rest, However, In The Middle Of

We Regard It As A Certainty That The Earth, Enclosed Between Poles, Is Bounded By A Spherical Surface.

I Am Aware That A Philosopher's Ideas Are Not Subject To The Judgment Of Ordinary Persons, Because It Is His Endeavour To Seek The Truth In All Things, To The Extent Permitted To Human Reason By God.

I Shall Now Recall To Mind That The Motion Of The Heavenly Bodies Is Circular, Since The Motion Appropriate To A Sphere Is Rotation In A Circle.

Astronomy Is Written For Astronomers

When, Therefore, I Had Long Considered This Uncertainty Of Traditional Mathematics, It Began To Weary Me That No More Definite Explanation Of The Movement Of The World-machine Established In Our Behalf By The Best And Most Systematic Builder Of All, Existed Among The Philosophers Who Had Studied So Exactly In Other Respects The Minutest Details In Regard To The Sphere.