Two Truths Cannot Contradict One Another.

That Sculpture Is More Admirable Than Painting For The Reason That It Contains Relief And Painting Does Not Is Completely False. ... Rather, How Much More Admirable The Painting Must Be Considered, If Having No Relief At All, It Appears To Have As Much As Sculpture!

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

Science Proceeds More By What It Has Learned To Ignore Than What It Takes Into Account.

But Of All Other Stupendous Inventions, What Sublimity Of Mind Must Have Been His Who Conceived How To Communicate His Most Secret Thoughts To Any Other Person, Though Very Far Distant Either In Time Or Place? And With No Greater Difficulty Than The Various Arrangement Of Two Dozen Little Signs Upon Paper? Let This Be The Seal Of All The Admirable Inventions Of Man.

Some, Merely To Contradict What I Had Said, Did Not Scruple To Cast Doubt Upon Things They Had Seen With Their Own Eyes Again And Again.