Plut. _Prim. Frig._ vii. 3, p. 947. According to Anaximenes, the early philosopher, we should not neglect either cold or heat in _being_ but should regard them as common experiences of matter which are incident to its changes. He says that the compressed and the condensed state of matter is cold, while the rarefied and relaxed (a word he himself uses) state of it is heat. Whence he says it is not strange that men breathe hot and cold out of the mouth; for the breath is cooled as it is compressed and condensed by the lips, but when the mouth is relaxed, it comes out warm by reason of its rarefaction. (_c_) PASSAGES RELATING TO ANAXIMENES IN THE DOXOGRAPHISTS. Theophrastos; Simpl. _Phys._ 6 r 24, 26; _Dox._ 476. Anaximenes of Miletos, son of Eurystratos, a companion of Anaximandros, agrees with him that the essential nature of things is one and infinite, but he regards it as not indeterminate but rather determinate, and calls it air; the air differs in rarity and in density as the nature of things is different; when very attenuated it becomes fire, when more condensed wind, and then cloud, and when still more condensed water and earth and stone, and all other things are composed of these; and he regards motion as eternal, and by this changes are produced.[18] Hipp. _Philos._ 7; _Dox._ 560. Anaximenes, himself a Milesian, son of Eurystratos, said that infinite air is the first principle,[19] from which arise the things that have come and are coming into existence, and the things that will be, and gods and divine beings, while other things are produced from these. And the form of air is as follows:—When it is of a very even consistency, it is imperceptible to vision, but it becomes evident as the result of cold or heat or moisture, or when it is moved. It is always in motion; for things would not change as they do unless it were in motion. It has a different appearance when it is made more dense or thinner; when it is expanded into a thinner state it becomes fire, and again winds are condensed air, and air becomes cloud by compression, and water when it is compressed farther, and earth and finally stones as it is more condensed. So that generation is controlled by the opposites, heat and cold. And the broad earth is supported on air;[20] similarly the sun and the moon and all the rest of the stars, being fiery bodies,[21] are supported on the air by their breadth.[22] And stars are made of earth, since exhalations arise from this, and these being attenuated become fire, and of this fire when it is raised to the heaven the stars are constituted. There are also bodies of an earthy nature[23] in the place occupied by the stars, and carried along with them in their motion. He says that the stars do not move under the earth, as others have supposed, but around the earth,[24] just as a cap is moved about the head. And the sun is hidden not by going underneath the earth,