In a word, God intimates, that the heavens leave no care to provide for us, and to distil dew so that the earth may bring forth fruit, and that the earth also, though called the mother of men, does not of itself open its bowels, but that the heavens as well as the earth bear a sure testimony to his paternal love, and also to the care which he exercises over us. God then shows, both by the heavens and the earth, that he provides for us; for when the heavens and the earth administer and supply us with the blessings of God, they thus declare his love towards us. So also, when the heaven is, as it were, iron, and when the earth with closed bowels refuses us food, we ought to know that they are commissioned to execute on us the vengeance of God. For they are not only the instruments of his bounty, but, when it is necessary, God employs them for the purpose of punishing us. This is briefly the meaning.