Progress Has Been Much More General Than

I See No Good Reasons Why The Views Given In This Volume Should Shock The Religious Views Of Anyone.

It Is Well-known That Those Who Have Charge Of Young Infants, That It Is Difficult To Feel Sure When Certain Movements About Their Mouths Are Really Expressive; That Is When They Really Smile. Hence I Carefully Watched My Own Infants. One Of Them At The Age Of Forty-five Days, And Being In A Happy Frame Of Mind, Smiled... I Observed The Same Thing On The Following Day: But On The Third Day The Child Was Not Quite Well And There Was No Trace Of A Smile, And This Renders It Probable That The Previous Smiles Were Real.

Linnaeus And Cuvier Have Been My Two Gods, Though In Very Different Ways, But They Were Mere Schoolboys To Old Aristotle.

We Are Always Slow In Admitting Any Great Change Of Which We Do Not See The Intermediate Steps

Every New Body Of Discovery Is Mathematical In Form, Because There Is No Other Guidance We Can Have.