Effort Supposes Resistance.

If We Are To Define Science, ... It Does Not Consist So Much In Knowing, Nor Even In "organized Knowledge," As It Does In Diligent Inquiry Into Truth For Truth's Sake, Without Any Sort Of Axe To Grind, Nor For The Sake Of The Delight Of Contemplating It, But From An Impulse To Penetrate Into The Reason Of Things.

Doubt Is An Uneasy And Dissatisfied State From Which We Struggle To Free Ourselves And Pass Into The State Of Belief; While The Latter Is A Calm And Satisfactory State Which We Do Not Wish To Avoid, Or To Change To A Belief In Anything Else.

It Is Not Knowing, But The Love Of Learning, That Characterizes The Scientific Man.

Law Is Par Excellence The Thing That Wants A Reason. Now The Only Possible Way Of Accounting For The Laws Of Nature, And For Uniformity In General, Is To Suppose Them Results Of Evolution.

The Pragmatist Knows That Doubt Is An Art Which Hs To Be Acquired With Difficulty.