Besides, we shall have to examine whether the earth be invisible without fire, and the fire intangible without the earth. Were this the case, nothing would possess its own proper being. All things would be mixed; each would reclaim its name only by the element preponderating in it; for it has been claimed that the earth could not exist without the humidity of water, which alone keeps all its parts united. Even were this granted, it would, none the less, remain absurd to say that each of these elements is something, while claiming that it does not possess any characteristically individual constitution, except by its union with the other elements, which, nevertheless, would not, any the more, exist individually, each in itself. What reality, indeed, would inhere in the nature or being of the earth, if none of its parts were earth except because the water that operated as a bond? Besides, with what could water unite without the preliminary existence of an extension whose parts were to be bound together for the formation of a continuous whole? The existence of an extension, however small it be, will imply the self-existence of earth, without the assistance of water; otherwise, there would be nothing for water to bind together. Nor would the earth have any need of air, since the air exists before the observation of any change within it. Nor is fire any more necessary to the constitution of the earth; fire only serves in making it visible, like all other objects. It is indeed reasonable to assert that it is fire which renders objects visible, and it is a mistake[215] to state that "one sees darkness," which cannot be seen any more than silence can be heard. Besides, there is no necessity for fire to be in earth; light suffices (to make it visible). Snow, and many other very cold substances are, without any fire, very brilliant--that is, unless we say that the fire approached them, and colored them before leaving them. ELEMENTS ARE NEVERTHELESS INDIVIDUAL. As to the other elements, could not water exist without participating in the earth? Air could certainly not be said to participate in earth, because of its penetrability. It is very doubtful that the fire contains any earth, because it does not seem continuous, and does not, by itself, seem to be tri-dimensional. True, fire does seem to contain solidity, but not of a tri-dimensional kind; it seems rather to be a sort of resistance corporeal nature[214]). Only of earth may hardness be predicated; indeed, gold, in liquid state, is dense; not because it is earth, but because it possesses density, and is solidified. It would therefore not be unreasonable that fire, apart by itself, could subsist by the power of the Soul which sustains it by her presence. The bodies of (certain among) the guardian spirits consist of fire.[216] TERRESTRIAL ELEMENTS, HOWEVER, DO NOT DEGRADE THE HEAVEN.