Mathematics Seems To Endow One With Something

...conscience Looks Backwards And Judges Past Actions, Inducing That Kind Of Dissatisfaction, Which If Weak We Call Regret, And If Severe Remorse.

Natural Selection Acts Solely By Accumulating Slight Successive Favorable Variations, It Can Produce No Great Or Sudden Modification; It Can Act Only By Very Short Steps.

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

When The Views Entertained In This Volume On The Origin Of Species, Or When Analogous Views Are Generally Admitted, We Can Dimly Forsee That There Will Be A Considerable Revolution In Natural History.

Although Much Remains Obscure, And Will Long Remain Obscure, ... I Am Convinced That Natural Selection Has Been The Main But Not Exclusive Means Of Modification.