{a187} 6. If God were not a Spirit, he were not immutable and unchangeable. His immutability depends upon his simplicity. He is unchangeable in his essence, because he is a pure and unmixed spiritual Being. Whatsoever is compounded of parts may be divided into those parts, and resolved into those distinct parts which make up and constitute the nature. Whatsoever is compounded is changeable in its own nature, though it should never be changed. Adam, who was constituted of body and soul, had he stood in innocence, had not died; there had been no separation made between his soul and body whereof he was constituted, and his body had not resolved into those principles of dust from whence it was extracted. Yet in his own nature he was dissoluble into those distinct parts whereof he was compounded; and so the glorified saints in heaven, after the resurrection, and the happy meeting of their souls and bodies in a new marriage knot, shall never be dissolved; yet in their own nature they are mutable and dissoluble, and cannot be otherwise, because they are made up of such distinct parts that may be separated in their own nature, unless sustained by the grace of God: they are immutable by will, the will of God, not by nature. God is immutable by nature as well as will: as he hath a necessary existence, so he hath a necessary unchangeableness (Mal. iii. 6), “I, the Lord, change not.” He is as unchangeable in his essence as in his veracity and faithfulness: they are perfections belonging to his nature. But if he were not a pure Spirit, he could not be immutable by nature. 7. If God were not a pure Spirit, he could not be omnipresent. He is in heaven above, and the earth below;[359] he fills heaven and earth.[360] The divine essence is at once in heaven and earth; but it is impossible a body can be in two places at one and the same time. Since God is everywhere, he must be spiritual. Had he a body, he could not penetrate all things; he would be circumscribed in place. He could not be everywhere but in parts, not in the whole; one member in one place, and another in another; for to be confined to a particular place, is the property of a body: but, since he is diffused through the whole world, higher than heaven, deeper than hell, longer than the earth, broader than the sea,[361] he hath not any corporeal matter. If he had a body wherewith to fill heaven and earth, there could be no body besides his own: it is the nature of bodies to bound one another, and hinder the extending of one another. Two bodies cannot be in the same place in the same point of earth: one excludes the other; and it will follow hence that we are nothing, no substances, mere illusions; there could be no place for anybody else.[362] If his body were as big as the world, as it must be if with that he filled heaven and earth, there would not be room for him to move a hand or a foot, or extend a finger; for there would be no place remaining for the motion.