As For A Future Life, Every Man

... Not One Living Species Will Transmit Its Unaltered Likeness To A Distant Futurity.

The Most Energetic Workers I Have Encountered In My World Travels Are The Vegetarian Miners Of Chile.

Ignorance More Frequently Begets Confidence Than Does Knowledge: It Is Those Who Know Little, And Not Those Who Know Much, Who So Positively Assert That This Or That Problem Will Never Be Solved By Science.

Light Will Be Thrown On The Origin Of Man And His History.

After Five Years' Work I Allowed Myself To Speculate On The Subject, And Drew Up Some Short Notes; These I Enlarged In 1844 Into A Sketch Of The Conclusions, Which Then Seemed To Me Probable: From That Period To The Present Day I Have Steadily Pursued The Same Object. I Hope That I May Be Excused For Entering On These Personal Details, As I Give Them To Show That I Have Not Been Hasty In Coming To A Decision.‎