Where The Senses Fail Us, Reason Must

They Who Depend Upon Manifest Observations Will Philosophize Better Than Those Who Persist In Opinions Repugnant To The Senses.

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.

Vision, I Say, Is Related To Light Itself. But Of This Sensation And The Things Pertaining To It, I Pretend To Understand But Little; And Since Even A Long Time Would Not Suffice To Explain That Trifle, Or Even To Hint At An Explanation, I Pass Over This In Silence.

Philosophy Itself Cannot But Benefit From Our Disputes, For If Our Conceptions Prove True, New Achievements Will Be Made; If False, Their Refutation Will Further Confirm The Original Doctrines.

Philosophy Is Written In That Great Book Which Ever Lies 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.