Where The Senses Fail Us, Reason Must

Philosophy [nature] Is Written In That Great Book Which Ever Is Before Our Eyes -- I Mean The Universe -- But We Cannot Understand It If We Do Not First Learn The Language And Grasp The Symbols In Which It Is Written. The Book Is Written In Mathematical Language, And The Symbols Are Triangles, Circles And Other Geometrical Figures, Without Whose Help It Is Impossible To Comprehend A Single Word Of It; Without Which One Wanders In Vain Through A Dark Labyrinth.

We See Only The Simple Motion Of Descent, Since That Other Circular One Common To The Earth, The Tower, And Ourselves Remains Imperceptible. There Remains Perceptible To Us Only That Of The Stone, Which Is Not Shared By Us; And, Because Of This, Sense Shows It As By A Straight Line, Always Parallel To The Tower, Which Is Built Upright And Perpendicular Upon The Terrestrial Surface.

There Are Those Who Reason Well, But They Are Greatly Outnumbered By Those Who Reason Badly.

Nature Is Written In Mathematical Language.

Take Note, Theologians, That In Your Desire To Make Matters Of Faith Out Of Propositions Relating To The Fixity Of Sun And Earth You Run The Risk Of Eventually Having To Condemn As Heretics Those Who Would Declare The Earth To Stand Still And The Sun To Change Position-eventually, I Say, At Such A Time As It Might Be Physically Or Logically Proved That The Earth Moves And The Sun Stands Still.