Alfred russel wallace

To expect the world to receive a new truth, or even an old truth, without challenging it, is to look for one of those miracles which do not occur.

What birds can have their bills more peculiarly formed than the ibis, the spoonbill, and the heron?

I have since wandered among men of many races and many religions.

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 complete success than in the case which I have here...

On the spiritual theory, man consists essentially of a spiritual nature or mind intimately associated with a spiritual body or soul, both of which are developed in and by means of a material organism.

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 considerations.

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

The foregoing considerations lead us to the very important conclusion, that matter is essentially force, and nothing but force; that matter, as popularly understood, does not exist, and is, in fact,...

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

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 structure and organization as specially adapted to...