Every species has come into existence coincident both in space and time with a pre-existing closely allied species..

I think I have fairly heard and fairly weighed the evidence on both sides, and I remain an utter disbeliever in almost all that you consider the most….

It has been generally the custom of writers on natural history to take the habits and instincts of animals as the fixed point, and to consider their ….

There is, I conceive, no contradiction in believing that mind is at once the cause of matter and of the development of individualised human minds thr….

In all works on Natural History, we constantly find details of the marvellous adaptation of animals to their food, their habits, and the localities i….

Why do some die and some live? The answer was clearly, that on the whole the best fitted live. From the effects of disease the most healthy escaped; ….

In my solitude I have pondered much on the incomprehensible subjects of space, eternity, life and death..

There is a tendency in nature to the continued progression of certain classes of varieties further and further from the original type..

In one of my latest conversations with Darwin he expressed himself very gloomily on the future of humanity, on the ground that in our modern civiliza….

The white men in our colonies are too frequently the savages.

Modification of form is admitted to be a matter of time.

I hold with Henry George, that at the back of every great social evil will be found a great political wrong.

Truth is born into this world only with pangs and tribulations, and every fresh truth is received unwillingly. To expect the world to receive a new t….

To say that mind is a product or function of protoplasm, or of its molecular changes, is to use words to which we can attach no clear conception.

As well might it be said that, because we are ignorant of the laws by which metals are produced and trees developed, we cannot know anything of the o….

If this is not done, future ages will certainly look back upon us as a people so immersed in the pursuit of wealth as to be blind to higher considera….

There might have been a hundred or a thousand life-bearing planets, had the course of evolution of the universe been a little different, or there mig….

In less than eight years "The Origin of Species" has produced conviction in the minds of a majority of the most eminent living men of science. New fa….

On the spiritual theory, man consists essentially of a spiritual nature or mind intimately associated with a spiritual body or soul, both of which ar….

I am decidedly of the opinion that in very many instances we can trace such a necessary connexion, especially among birds, and often with more comple….

Truth is born into this world only with pangs and tribulations, and every fresh truth is received unwillingly..