Every New Concept First Comes To The

Bad Reasoning As Well As Good Reasoning Is Possible; And This Fact Is The Foundation Of The Practical Side Of Logic.

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.

All The Greatest Achievements Of Mind Have Been Beyond The Power Of Unaided Individuals.

There Is Not A Single Truth Of Science Upon Which We Ought To Bet More Than About A Million Of Millions To One.

It Is A Common Observation That Those Who Dwell Continually Upon Their Expectations Are Apt To Become Oblivious To The Requirements Of Their Actual Situation.