When Anything Is Present To The Mind,

We Should Chiefly Depend Not Upon That Department Of The Soul Which Is Most Superficial And Fallible (our Reason), But Upon That Department That Is Deep And Sure, Which Is Instinct.

For Example, There Are Numbers Of Chemists Who Occupy Themselves Exclusively With The Study Of Dyestuffs. They Discover Facts That Are Useful To Scientific Chemistry; But They Do Not Rank As Genuine Scientific Men. The Genuine Scientific Chemist Cares Just As Much To Learn About Erbium-the Extreme Rarity Of Which Renders It Commercially Unimportant-as He Does About Iron. He Is More Eager To Learn About Erbium If The Knowledge Of It Would Do More To Complete His Conception Of The Periodic Law, Which Expresses The Mutual Relations Of The Elements.

... And It Is Probably That There Is Some Secret Here Which Remains To Be Discovered.

If Liberty Of Speech Is To Be Untrammeled From The Grosser Forms Of Constraint, The Uniformity Of Opinion Will Be Secured By A Moral Terrorism To Which The Respectability Of Society Will Give Its Thorough Approval.

The One [the Logician] Studies The Science Of Drawing Conclusions, The Other [the Mathematician] The Science Which Draws Necessary Conclusions.