Man treats those co-operating with him in the labor of life as mere means to his own selfish purposes. He feeds and shelters them for the same reason… - J. Howard Moore

[T]he difference in mental method between the man of learning and the ordinary man or woman is the same as the difference between mature men and children and between men generally and other animals. It is one of degree, not of kind. The philosopher, the clodhopper, and the ape, all use precisely the same methods of reasoning, differing only in exactness and in the materials of consciousness dealt with.

Sometimes, in our littleness, we boast of the progress we have made, and of the knowledge, culture, and art which we as a race to-day display. But, O, it is the vanity of Adolescence. What will the knowledge, culture, and art of to-day amount to fifty or a hundred thousand years from now?—or a million years from now? Nothing! This sphere, with its clinging tenantry, will still be here then and will still be making its annual journeys round the sun, as now. But, O, what mighty and ineffable changes! The things of to-day will be so rude and childish and so far away that they will not even be considered.

[M]an is an animal. It was away out there on the prairies, among the green corn rows, one beautiful June morning—a long time ago it seems to me now—that this revelation really came to me. And I repeat it here, as it has grown to seem to me, for the sake of a world which is so wise in many things, but so darkened and wayward regarding this one thing. However averse to accepting it we may be on account of favourite traditions, man is an animal in the most literal and materialistic meaning of the word. Man has not a spark of so-called 'divinity' about him. In important respects he is the most highly evolved of animals; but in origin, disposition, and form he is no more 'divine' than the dog who laps his sores, the terrapin who waddles over the earth in a carapace, or the unfastidious worm who dines on the dust of his feet. Man is not the pedestalled individual pictured by his imagination—a being glittering with prerogatives, and towering apart from and above all other beings. He is a pain-shunning, pleasure-seeking, death-dreading organism, differing in particulars, but not in kind, from the pain-shunning, pleasure-seeking, death-dreading organisms below and around him. Man is neither a rock, a vegetable, nor a deity. He belongs to the same class of existences, and has been brought into existence by the same evolutional processes, as the horse, the toad that hops in his garden, the firefly that lights its twilight torch, and the bivalve that reluctantly feeds him.