Progress Has Been Much More General Than

Nothing Is Easier Than To Admit In Words The Truth Of The Universal Struggle For Life, Or More Difficult--at Least I Have Found It So--than Constantly To Bear This Conclusion In Mind.

I Can Indeed Hardly See How Anyone Ought To Wish Christianity To Be True For If So The Plain Language Of The Text Seems To Show That The Men Who Do Not Believe, And This Would Include My Father, Brother And Almost All Of My Friends, Will Be Everlastingly Punished. And This Is A Damnable Doctrine.

On Seeing The Marsupials In Australia For The First Time And Comparing Them To Placental Mammals: “an Unbeliever . . . Might Exclaim 'surely Two Distinct Creators Must Have Been At Work'”

You Ask About My Opinion On Vivisection. I Quite Agree That It Is Justifiable For Real Investigations On Physiology; But Not For Mere Damnable And Detestable Curiosity.

I Have Deeply Regretted That I Did Not Proceed Far Enough At Least To Understand Something Of The Great Leading Principles Of Mathematics, For Men Thus Endowed Seem To Have An Extra Sense.