2.
I am almost convinced (quite contrary to opinion I started with) that species are not (it is like confessing a murder) immutable.
Charles Darwin
3.
Why, if species have descended from other species by insensibly fine gradations, do we not everywhere see innumerable transitional forms.
Charles Darwin
4.
... not one living species will transmit its unaltered likeness to a distant futurity.
Charles Darwin
6.
One general law, leading to the advancement of all organic beings, namely, multiply, vary, let the strongest live and the weakest die.
Charles Darwin
7.
Mere chance ... alone would never account for so habitual and large an amount of difference as that between varieties of the same species.
Charles Darwin
8.
Multiply, vary, let the strongest live and the weakest die.
Charles Darwin
9.
Man selects only for his own good: Nature only for that of the being which she tends.
Charles Darwin
10.
His subject is the "Origin of Species," & not the origin of Organization; & it seems a needless mischief to have opened the latter speculation at all.
Harriet Martineau