Psalms 104:5

5He hath founded the earth upon its foundations Here the prophet celebrates the glory of God, as manifested in the stability of the earth. Since it is suspended in the midst of the air, and is supported only by pillars of water, how does it keep its place so steadfastly that it cannot be moved? This I indeed grant may be explained on natural principles; for the earth, as it occupies the lowest place, being the center of the world, naturally settles down there. But even in this contrivance there shines forth the wonderful power of God. Again, if the waters are higher than the earth, because they are lighter, why do they not cover the whole earth round about? Certainly the only answer which philosophers can give to this is, that the tendency of the waters to do so is counteracted by the providence of God, that a dwelling-place might be provided for man. If they do not admit that the waters are restrained by the determinate appointment of God, they betray not only their depravity and unthankfulness, but also their ignorance, and are altogether barbarous. The prophet, therefore, not without reason, recounts among the miracles of God, that which would be to us wholly incredible, did not even experience show its truth. We are very base indeed if, taught by such undoubted a proof, we do not learn that nothing in the world is stable except in as far as it is sustained by the hand of God. The world did not originate from itself, consequently, the whole order of nature depends on nothing else than his appointment, by which each element has its own peculiar property. Nor is the language of the prophet to be viewed merely as an exhortation to give thanks to God; it is also intended to strengthen our confidence in regard to the future, that we may not live in the world in a state of constant fear and anxiety, as we must have done had not God testified that he has given the earth for a habitation to men. It is a singular blessing, which he bestows upon us, in his causing us to dwell upon the earth with undisturbed minds, by giving us the assurance that he has established it upon everlasting pillars. Although cities often perish by earthquakes, yet the body of the earth itself remains. Yea, all the agitations which befall it more fully confirm to us the truth, that the earth would be swallowed up every moment were it not preserved by the secret power of God.