A Man Is Crazy Who Writes A

Cease To Be Ruled By Dogmas And Authorities; Look At The World!

For If Any Man Who Never Saw Fire Proved By Satisfactory Arguments That Fire Burns. His Hearer's Mind Would Never Be Satisfied, Nor Would He Avoid The Fire Until He Put His Hand In It That He Might Learn By Experiment What Argument Taught.

A Man Is Crazy Who Writes A Secret In Any Other Way Than One Which Will Conceal It From The Vulgar.

Neglect Of Mathematics Work Injury To All Knowledge, Since He Who Is Ignorant Of It Cannot Know The Other Sciences Or Things Of This World. And What Is Worst, Those Who Are Thus Ignorant Are Unable To Perceive Their Own Ignorance, And So Do Not Seek A Remedy.

It Is Easier For A Man To Burn Down His Own House Than To Get Rid Of His Prejudices.