In short, spirituality is attained by all beings, not only by man but by the beasts and the birds, and each has its own religion, its principle, its law, and its morals. For instance, a bird, whose honor it is to fly over the heads of those who walk on the earth, feels it beneath its dignity to be touched by an earthly being: it feels it is polluted. And if this bird is touched once by a human being, its fellow creatures will not rest till they have killed it, for it is outcast for them; they dwell in the air and it is their dignity to be so.