Effort Supposes Resistance.

Third, Consider The Insistency Of An Idea. The Insistency Of A Past Idea With Reference To The Present Is A Quantity Which Is Less, The Further Back That Past Idea Is, And Rises To Infinity As The Past Idea Is Brought Up Into Coincidence With The Present.

The Idea Does Not Belong To The Soul; It Is The Soul That Belongs To The Idea.

Do You Call It Doubting To Write Down On A Piece Of Paper That You Doubt? If So, Doubt Has Nothing To Do With Any Serious Business. But Do Not Make Believe; If Pedantry Has Not Eaten All The Reality Out Of You, Recognize, As You Must, That There Is Much That You Do Not Doubt, In The Least. Now That Which You Do Not At All Doubt, You Must And Do Regard As Infallible, Absolute Truth.

...mathematics Is Distinguished From All Other Sciences Except Only Ethics, In Standing In No Need Of Ethics. Every Other Science, Even Logic, Especially In Its Early Stages, Is In Danger Of Evaporating Into Airy Nothingness, Degenerating, As The Germans Say, Into An Arachnoid Film, Spun From The Stuff That Dreams Are Made Of. There Is No Such Danger For Pure Mathematics; For That Is Precisely What Mathematics Ought To Be.

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.