The Pragmatist Knows That Doubt

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

The Essence Of Belief Is The Establishment Of A Habit.

...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.

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

The Woof And Warp Of All Thought And All Research Is Symbols, And The Life Of Thought And Science Is The Life Inherent In Symbols; So That It Is Wrong To Say That A Good Language Is Important To Good Thought, Merely; For It Is The Essence Of It.