See Now The Power Of Truth.

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.

But What Exceeds All Wonders, I Have Discovered Four New Planets And Observed Their Proper And Particular Motions, Different Among Themselves And From The Motions Of All The Other Stars; And These New Planets Move About Another Very Large Star [jupiter] Like Venus And Mercury, And Perchance The Other Known Planets, Move About The Sun. As Soon As This Tract, Which I Shall Send To All The Philosophers And Mathematicians As An Announcement, Is Finished, I Shall Send A Copy To The Most Serene Grand Duke, Together With An Excellent Spyglass, So That He Can Verify All These Truths.

The Prohibition Of Science Would Be Contrary To The Bible, Which In Hundreds Of Places Teaches Us How The Greatness And The Glory Of God Shine Forth Marvelously In All His Works, And Is To Be Read Above All In The Open Book Of The Heavens.

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.

Measure What Can Be Measured, And Make Measureable What Cannot Be Measured.