And What, Then, Is Belief? It Is

It Is Terrible To See How A Single Unclear Idea, A Single Formula Without Meaning, Lurking In A Young Man's Head, Will Sometimes Act Like An Obstruction Of Inert Matter In An Artery, Hindering The Nutrition Of The Brain And Condemning Its Victim To Pine Away In The Fullness Of His Intellectual Vigor And In The Midst Of Intellectual Plenty.

All The Progress We Have Made In Philosophy ... Is The Result Of That Methodical Skepticism Which Is The Element Of Human Freedom.

Mere Imagination Would Indeed Be Mere Trifling; Only No Imagination Is Mere .

We Cannot Begin With Complete Doubt.

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.