If You Could See The Earth Illuminated

One Can Understand Nature Only When One Has Learned The Language And The Signs In Which It Speaks To Us; But This Language Is Mathematics And These Signs Are Methematical Figures.

The Book Of Nature Is Written In The Language Of Mathematics.

Alas! Your Dear Friend And Servant Galileo Has Been For The Last Month Hopelessly Blind; So That This Heaven, This Earth, This Universe, Which I By My Marvelous Discoveries And Clear Demonstrations Had Enlarged A Hundred Thousand Times Beyond The Belief Of The Wise Men Of Bygone Ages, Henceforward For Me Is Shrunk Into Such A Small Space As Is Filled By My Own Bodily Sensations.

Who Would Dare Assert That We Know All There Is To Be Known?

I Am Certainly Interested In A Tribunal In Which, For Having Used My Reason, I Was Deemed Little Less Than A Heretic. Who Knows But Men Will Reduce Me From The Profession Of A Philosopher To That Of Historian Of The Inquisition!