_4thly_, Men change their minds many times, for want of foresight; something unexpected occurs that renders it expedient for them to alter their purpose, which argues a defect of wisdom: but God is infinitely wise; therefore nothing unforeseen can intervene to induce him to change his purpose. _5thly_, Men are sometimes obliged to change their purpose by the influence, threatenings, or other methods, used by some superior; but there is none equal, much less superior, to God; and consequently none can lay any obligation on him to change his purpose. VII. God is incomprehensible: this implies that his perfections cannot be fully known by any creature; thus it is said, _Canst thou by searching, find out God? Canst thou find out the Almighty unto perfection?_ Job xi. 7. When we consider God as incomprehensible, we do not only mean that man in this imperfect state, cannot fully comprehend his glory; for it is but very little, comparatively, that we can comprehend of finite things, and we know much less of that which is infinite; but when we say that God is incomprehensible, we mean that the best of creatures, in the most perfect state, cannot fully conceive of, or describe his glory; and the reason is, because they are finite, and his perfections are infinite; and there is no proportion between an infinite God, and a finite mind: the water of the ocean might as well be contained in the hollow of the hand, or the dust of the earth weighed in a balance, as that the best of creatures should have a perfect and adequate idea of the divine perfections. In this case, we generally distinguish between apprehending, and comprehending; the former denotes our having some imperfect, or inadequate ideas of what surpasses our understanding; the latter, our knowing every thing that is contained in it, which is called our having an adequate idea thereof: now we apprehend something of the divine perfections, in proportion to the limits of our capacities, and our present state; but we cannot, nor ever shall, be able to comprehend the divine glory, since God is incomprehensible to every one but himself. Again, we farther distinguish between our having a full conviction that God hath those infinite perfections, which no creature can comprehend, and our being able fully to describe them: thus we firmly believe that God exists throughout all the changes of time, and yet that his duration is not measured thereby, or that he fills all places without being co-extended with matter; we apprehend, as having an undeniable demonstration thereof, that he does so, though we cannot comprehend how he does it.