Light will be thrown on the origin of man and his history.

Judging from the past, we may safely infer that not one living species will transmit its unaltered likeness to a distant futurity.

There is no fundamental difference between man and animals in their ability to feel pleasure and pain, happiness, and misery.

But Natural Selection, as we shall hereafter see, is a power incessantly ready for action, and is immeasurably superior to man's feeble efforts, as the works of Nature are to those of Art.

In a series of forms graduating insensibly from some apelike creature to man as he now exists, it would be impossible to fix on any definite point where the term 'man' ought to be used.

Man selects only for his own good: Nature only for that of the being which she tends.