Any one whose disposition leads him to attach more weight to unexplained difficulties than to the explanation of facts will certainly reject my theor….

The love of a dog for his master is notorious; in the agony of death he has been known to caress his master, and everyone has heard of the dog suffer….

I agree with Agassiz that dogs possess something very like conscience..

But when on shore, & wandering in the sublime forests, surrounded by views more gorgeous than even Claude ever imagined, I enjoy a delight which none….

Man himself cannot express love and humility by external signs, so plainly as does a dog, when with drooping ears, hanging lips, flexuous body, and w….

We have seen that the senses and intuitions, the various emotions and faculties, such as love, memory, attention and curiosity, imitation, reason, et….

The following proposition seems to me in a high degree probable—namely, that any animal whatever, endowed with well-marked social instincts, the pare….

I am almost convinced (quite contrary to opinion I started with) that species are not (it is like confessing a murder) immutable..

Not one great country can be named, from the polar regions in the north to New Zealand in the south, in which the aborigines do not tattoo themselves..

Man, wonderful man, must collapse, into nature's cauldron, he is no deity, he is no exception..

Jealousy was plainly exhibited when I fondled a large doll, and when I weighed his infant sister, he being then 15? months old. Seeing how strong a f….

Formerly Milton's Paradise Lost had been my chief favourite, and in my excursions during the voyage of the Beagle, when I could take only a single sm….

But just in proportion as this process of extermination has acted on an enormous scale, so must the number of intermediate varieties, which have form….

The survival or preservation of certain favoured words in the struggle for existence is natural selection..

Only the fittest will survive..

I had gradually come, by this time [1839-01], to see that the Old Testament from its manifestly false history of the world, with the Tower of Babel, ….

I look at the natural geological record as a history of the world imperfectly kept and written in a changing dialect; of this history we possess the ….

... probably all the organic beings which have ever lived on this earth have descended from some one primordial form, into which life was first breat….

At some future period, not very distant as measured by centuries, the civilized races of man will almost certainly exterminate, and replace the savag….

The most energetic workers I have encountered in my world travels are the vegetarian miners of Chile..

There is a grandeur in this view of life, from so simple a beginning endless forms most beautiful are being evolved.