When A Philosopher Says Something That Is

Theory Attracts Practice As The Magnet Attracts Iron.

A Great Part Of Its Theories Derives An Additional Charm From The Peculiarity That Important Propositions, With The Impress Of Simplicity On Them, Are Often Easily Discovered By Induction, And Yet Are Of So Profound A Character That We Cannot Find The Demonstrations Till After Many Vain Attempts; And Even Then, When We Do Succeed, It Is Often By Some Tedious And Artificial Process, While The Simple Methods May Long Remain Concealed.

There Have Been Only Three Epoch-making Mathematicians, Archimedes, Newton, And Eisenstein.

When I Have Clarified And Exhausted A Subject, Then I Turn Away From It, In Order To Go Into Darkness Again.

We Must Admit With Humility That, While Number Is Purely A Product Of Our Minds, Space Has A Reality Outside Our Minds, So That We Cannot Completely Prescribe Its Properties A Priori.