Alfred Russel Wallace

Civilisation has ever accompanied emigration and conquest - the conflict of opinion, of religion, or of race. ”

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. ”

What we need are not prohibitory marriage laws, but a reformed society, an educated public opinion which will teach individual duty in these matters. ”

But naturalists are now beginning to look beyond this, and to see that there must be some other principle regulating the infinitely varied forms of animal life. ”

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

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 origin of steamships and railways. ”

I spent, as you know, a year and a half in a clergyman's family and heard almost every Tuesday the very best, most earnest and most impressive preacher it has ever been my fortune to meet with, but it produced no effect whatever on my mind. ”

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. ”

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 be in accordance with them. ”

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. ”