Moreover, Since The Sun Remains

To Know That We Know What We Know, And To Know That We Do Not Know What We Do Not Know, That Is True Knowledge.

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

Of All Things Visible, The Highest Is The Heaven Of The Fixed Stars.

For What Could Be More Beautiful Than The Heavens Which Contain All Beautiful Things.

Therefore, When I Considered This Carefully, The Contempt Which I Had To Fear Because Of The Novelty And Apparent Absurdity Of My View, Nearly Induced Me To Abandon Utterly The Work I Had Begun.