[103] When therefore it has been extended and increased to such a degree, as to be very nearly equal to the infinite extent of the vacuum by the boundless and illimitable extension of its own diffusion, it then, according to them, is itself the principle of seed to itself; but when, according to a perfect regeneration of the parts, its entire substance...... [28] being contracted in the extinction of the fire into dense air; but when the air again is contracted, and when it settles down into water, then again the water is still further condensed, so as to be changed into earth, which is the best of all the elements. But all these arguments are beyond the ordinary ideas of those who are able to consider and argue upon the consequences of these things.