We saw just now that the names of numbers may most easily be replaced by signs. Numbers are simple analytical conceptions, and for that very reason they are not liable to mythology: name and conception being here commensurate, no misunderstanding is possible. But as soon as we leave this department of thought, mythology begins. I shall try by at least one example to show how mythology not only pervades the sphere of religion or religious tradition, but infects more or less the whole realm of thought. When man wished for the first time to grasp and express a distinction between the body and something else within him distinct from the body, an easy name that suggested itself was _breath_. The breath seemed something immaterial and almost invisible, and it was connected with the life that pervaded the body, for as soon as the breath ceased, the life of the body became extinct. Hence the Greek name ψυχή,(26) which originally meant breath, was chosen to express at first the principle of life, as distinguished from the decaying body, afterwards the incorporeal, the immaterial, the undecaying, the immortal part of man—his soul, his mind, his Self. All this was very natural. When a person dies, we too say that he has given up the ghost, and ghost, too, meant originally spirit, and spirit meant breath. A very instructive analogous case is quoted by Mr. E. B. Tylor from a compendium of the theology of the Indians of Nicaragua, the record of question and answer in an inquest held by Father Francisco de Bobadilla in the early days of the Spanish conquest. Asked, among other things, concerning death, the Indians said: “Those who die in their houses go underground, but those who are killed in war go to serve the gods (_teotes_). When men die, there comes forth from their mouth something which resembles a person, and is called _julio_ (Aztec _yuli_, ‘to live’). This being is like a person, but does not die, and the corpse remains here.” The Spanish ecclesiastics inquired whether those who go on high keep the same body, features, and limbs as here below; to which the Indians answered, “No, there is only the heart.” “But,” said the Spaniards, “as the hearts are torn out” (they meant in the case of warriors who fell into the hands of the enemy), “what happens then?” Hereupon the Indians replied: “It is not precisely the heart, but that which is in them, and makes them live, and which quits the body when they die;” and again they said, “It is not their heart which goes up on high, but that which makes them live, that is, the breath coming out from their mouth, which is called _julio_.” “Then,” asked the Spaniards, “does this heart, _julio_, or soul, die with the body?” “When the deceased has lived well,” replied the Indians, “the _julio_ goes up on high with our gods; but when he has lived ill, the _julio_ perishes with the body, and there is an end of it.”