I Shall Now Recall To Mind That

Therefore I Would Not Have It Unknown To Your Holiness, The The Only Thing Which Induced Me To Look For Another Way Of Reckoning The Movements Of The Heavenly Bodies Was That I Knew That Mathematicians By No Means Agree In Their Investigation Thereof.

I Therefore Took This Opportunity And Also Began To Consider The Possibility That The Earth Moved. Although It Seemed An Absurd Opinion, Nevertheless, Because I Knew That Others Before Me Had Been Granted The Liberty Of Imagining Whatever Circles They Wished To Represent The Phenomena Of The Stars, I Thought That I Likewise Would Readily Be Allowed To Test Whether, By Assuming Some Motion Of The Earth's, More Dependable Representations Than Theirs Could Be Found For The Revolutions Of The Heavenly Spheres.

Finally We Shall Place The Sun Himself At The Center Of The Universe.

Therefore, Having Obtained The Opportunity From These Sources, I Too Began To Consider The Mobility Of The Earth.

First Of All, We Must Note That The Universe Is Spherical.