John Gill's Exposition of the Whole Bible
Job 5:9
Which doeth great things,.... The things of creation are great things, the making of the heavens and the earth, and all therein, by the word of the Almighty, out of nothing, and which is a display of great power, wisdom, and goodness; the things of Providence are great things, which God is always doing; as the upholding all things in being by the word of his power, governing the whole universe, ordering all things in it, supplying and feeding all creatures, men and beasts; and especially the things of grace are great things, the covenant of grace, and its blessings, redemption by Jesus Christ, the work of grace upon the heart, the quickening and enlightening dead and dark sinners, taking away their hearts of stone and giving them hearts of flesh, and constantly supplying them with his grace for the finishing of it; the consideration of all which is a great encouragement to seek the Lord in time of need, as well as of what follows concerning them:
and unsearchable; the things of nature; many of them are such as puzzle the greatest philosophers, who are not able, with all their sagacity and penetration, to find out the causes and reasons of them; and in providence the way of God is often in the deep, and is not to be tracked and followed; and the dispensations of his grace to the sons of men are so sovereign and distinguishing, that it made the apostle say, speaking of them, "O the depth", c. Romans 11:33 and there are some things not to be inquired into, nor can they be searched out; secret things belong to God, as his purposes relating to the eternal state of particular persons, and the times and seasons of various future events, as the day of judgment, c.
marvellous things in nature, as the formation of man and all creatures; in providence, and it may be respect may be had to the wonders done in Egypt, and the marvellous things in the field of Zoan, the plagues of Egypt, and the deliverance of Israel, and their passage through the Red sea; which were things done much about this time, or before it, as some think, and of which Eliphaz might have heard, and were fresh in his memory; and wonderful things are done in grace, as the effects of marvellous loving kindness: and those
without number; the works of God are manifold, and not to be counted; the stars of heaven, the fowls of the air, the beasts of the field, and cattle on a thousand hills, the fishes of the sea, small and great, see
Psalms 104:25; to which may be added, those animalcules, of which a billion do not exceed the size of a small grain of sand, as they may be seen through a microscope h; the various things done every day in providence, the special blessings of goodness, and the kind thoughts of the heart of God, which, if one attempt to reckon up, they are more than can be numbered, Psalms 40:5.
h Leuwenhoeck apud Scheuchzer. Physic. Sacr. vol. 4. p. 667.