A Cell Is Regarded As

The Intensity Of Vision In The Artist And Of Vividness In His Creations Are The Sole Tests Of His Imaginative Power.

If The Members Of A Class Do Not Understand -- If Those Directly Addressed Fail To Listen, Or Listening, Fail To Recognize A Power In The Voice -- Surely The Fault Lies With The Speaker, Who, Having Attempted To Secure Their Attention And Enlighten Their Understandings, Has Failed In The Attempt.

If You Feel Yourself To Be Above The Mass, Speak So As To Raise The Mass To The Height Of Your Argument.

"there Is One Basis Of Science," Says Descartes, "one Test And Rule Of Truth, Namely, That Whatever Is Clearly And Distinctly Conceived Is True." A Profound Psychological Mistake. It Is True Only Of Formal Logic, Wherein The Mind Never Quits The Sphere Of Its First Assumptions To Pass Out Into The Sphere Of Real Existences; No Sooner Does The Mind Pass From The Internal Order To The External Order, Than The Necessity Of Verifying The Strict Correspondence Between The Two Becomes Absolute. The Ideal Test Must Be Supplemented By The Real Test, To Suit The New Conditions Of The Problem.

Mathematicians Do Not Write For The Circulating Library.