In The Practical Use Of Our Intellect,

As We Take, In Fact, A General View Of The Wonderful Stream Of Our Consciousness, What Strikes Us First Is This Different Pace Of Its Parts. Like A Bird 's Life, It Seems To Be Made Of An Alternation Of Flights And Perchings.

Psychology Saves Us From Mistakes. It Makes Us More Clear As To What We Are About. We Gain Confidence In Respect To Any Method Which We Are Using As Soon As We Believe That It Has Theory As Well As Practice At Its Back.

In Order To Disprove The Assertion That All Crows Are Black, One White Crow Is Sufficient.

Keep The Faculty Of Effort Alive In You By A Little Gratuitous Exercise Every Day.

...these Healers...my Intellect Has Been Unable To Assimilate Their Theories....but Their Facts Are Patent And Startling; And Anything That Interferes With The Multiplication Of Such Facts, And With Our Freest Opportunity Of Observing And Studying Them, Will, I Believe, Be A Public Calamity.