Man is a Religious Animal. He is the only Religious Animal. He is the only animal that has the True Religion — several of them. He is the only animal that loves his neighbor as himself and cuts his throat if his theology isn't straight. He has made a graveyard of the globe in trying his honest best to smooth his brother's path to happiness and heaven....The higher animals have no religion. And we are told that they are going to be left out in the Hereafter. I wonder why? It seems questionable taste.

"Man is the religious animal. He is the only religious animal. He is the only animal that has the True Religion –- several of them. He is the only animal that loves his neighbor as himself and cuts his throat, if his theology isn't straight. He has made a graveyard of the globe in trying his honest best to smooth his brother's path to happiness and heaven." Mark Twain

[Man] is the only animal that has the True Religion—several of them.

Man is by his constitution a religious animal; . . . atheism is against, not only our reason but our instincts.

Man is the "ethical animal" — ethical in potentiality even if, unfortunately, not in actuality. His capacity for ethical judgment — like freedom, reason and the other unique characteristics of the human being — is based upon his consciousness of himself.

Animal in man is the drive to concentrate on the satisfaction of needs; spiritual in man is the will to serve higher ends, and in serving ends he transcends his needs.

Man is a political animal in certain societies, but it is also an emotional and imaginative animal in any context. Its spirituality is a lot more powerful and omnipresent than politics. My characters might be influenced by political events, but politics isn’t what governs in their lives, but spirituality. A citizen in any Western country could describe themselves as a political animal”; but a druid priest, masai or pygmy in Africa, an indigenous person from the Caribbean in pre-historic times or even the Amazon today, doesn’t follow these parameters. According to these cultures, the spirit and emotions are a lot more important.

Religion is still useful among the herd - that it helps their orderly conduct as nothing else could. The crude human animal is in-eradicably superstitious, and there is every biological reason why they should be.
Take away his Christian god and saints, and he will worship something else...

[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.

Once animals had a more sacred, more divine character than men. There is not even a reign of the "human" in primitive societies, and for a long time the animal order has been the order of reference. Only the animal is worth being sacrificed, as a god, the sacrifice of man only comes afterward, according to a degraded order. Men qualify only by their affiliation to the animal: the Bororos "are" macaws.

Man is a talkative and religious ape. He is an ape, but with a much greater amount of enterprise and with a greater likelihood of being found in every variety of climate. Like the anthropoid, man has a bald face and an obsolete tail. But he is distinguished from his arboreal relative by his arrogant bearing, his skilled larynx, and especially by the satisfaction he experiences in the contemplation of the image which appears when he looks in a mirror.

The faculty by which man is differentiated from the lower animals is his reasoning power. But the devout believer renounces reason, refuses to explain the things which surround him, the innumerable natural phenomena, because his religious faith is enough for him. The brain loses the habit of thinking; and this religious sottishness hurls mankind back into animalism.

Man is the only animal that laughs and weeps; for he is the only animal that is struck with the difference between what things are, and what they ought to be.

It has been said a thousand times and in a thousand books that ancestor-worship is for the most part the source of primitive religions, and it may be strictly said that what most distinguishes man from the other animals is that, in one form or another, he guards his dead and does not give them over to the neglect of teeming mother earth; he is an animal that guards its dead.