Know now that God - Understand the case; and in order that they might, he goes into an extended description of the calamities which God had brought upon him. He wished them to be "fully" apprised of all that he had suffered at the hand of God.
Hath overthrown me - The word used here (עות ‛âvath) means to bend, to make crooked or curved; then to distort, prevert: them to overturn, to destroy; Isaiah 24:1; Lamentations 3:9. The meaning here is, that he had been in a state of prosperity, but that God had completely "reversed" everything.
And hath compassed me with his net - Has sprung his net upon me as a hunter does, and I am caught. Perhaps there may be an allusion here to what Bildad said in Job 18:8 ff, that the wicked would be taken in his own snares. Instead of that, Job says that "God" had sprung the snare upon him - for reasons which he could not understand, but in such a manner as should move the compassion of his friends.

Know now that God hath overthrown me - The matter is between him and me, and he has not commissioned you to add reproaches to his chastisements.
And hath compassed me with his net - There may be an allusion here to the different modes of hunting which have been already referred to in the preceding chapter. But if we take the whole verse together, and read the latter clause before the former, thus, "Know, therefore, that God hath encompassed me with his net, and overthrown me;" the allusion may be to an ancient mode of combat practiced among the ancient Persians, ancient Goths, and among the Romans. The custom among the Romans was this: "One of the combatants was armed with a sword and shield, the other with a trident and net. The net he endeavored to cast over the head of his adversary, in which, when he succeeded, the entangled person was soon pulled down by a noose that fastened round the neck, and then despatched. The person who carried the net and trident was called Retiarius, and the other who carried the sword and shield was termed Secutor, or the pursuer, because, when the Retiarius missed his throw, he was obliged to run about the ground till he got his net in order for a second throw, while the Secutor followed hard to prevent and despatch him." The Persians in old times used what was called (Persic) kumund, the noose. It was not a net, but a sort of running loop, which horsemen endeavored to cast over the heads of their enemies that they might pull them off their horses. That the Goths used a hoop net fastened to a pole, which they endeavored to throw over the heads of their foes, is attested by Olaus Magnus, Hist. de Gentibus Septentrionalibus, Romans. 1555, lib. xi., cap. 13, De diversis Modis praeliandi Finnorum. His words are, Quidam restibus instar retium ferinorum ductilibus sublimi jactatione utuntur: ubi enim cum hoste congressi sunt, injiciunt eos restes quasi laqueos in caput resistentis, ut equum aut hominem ad se trahant. "Some use elastic ropes, formed like hunting nets, which they throw aloft; and when they come in contact with the enemy, they throw these ropes over the head of their opponent, and by this means they can then drag either man or horse to themselves." At the head of the page he gives a wood-cut representing the net, and the manner of throwing it over the head of the enemy. To such a device Job might allude, God hath encompassed me with his Net, and overthrown me.

Know now that God hath (c) overthrown me, and hath compassed me with his net.
(c) He breaks out again into his passions and declares still that his affliction comes from God though he is not able to feel the cause in himself.

Know now that God hath overthrown me,.... He would have them take notice that all his afflictions were from the hand of God; and therefore should take care to what they imputed any acts of his, whose ways are unsearchable, and the reasons of them not to be found out; and therefore, if a wrong construction should be put upon them, which may be easily done by weak sighted men, it must be displeasing to him. Job had all along from the first ascribed his afflictions to God, and he still continued to do so; he saw his hand in them all; whoever were the instruments, it was God that had overthrown him, or cast him down from an high to a very low estate; that had taken away his substance, his children, and his wealth: or "hath perverted me" (l); not that God had made him perverse, or was the cause or occasion of any perverseness in him, either in his words or in his actions, or had perverted his cause, and the judgment of it; Job could readily answer to those questions of Bildad, "doth God pervert judgment? or doth the Almighty pervert justice?" and say, no, he doth not; but he is to be understood in the same sense as the church is, when she says, see Lamentations 3:9; "he hath made my path crooked"; where the same word is used as here; and both she and Job mean that God had brought them into cross, crooked, and afflictive dispensations:
and hath compassed me with his net; and which also designs affliction, which is God's net, which he has made, ordained, and makes use of; which he lays for his people, and takes them in, and draws them to himself, and prevents them committing sin, and causes to issue in their good; see Lamentations 1:13.
(l) "pervertit me", Montanus, Mercerus; so Vatablus, Drusius, Schultens.

compassed . . . net--alluding to Bildad's words (Job 18:8). Know, that it is not that I as a wicked man have been caught in my "own net"; it is God who has compassed me in His--why, I know not.