In God have I put my trust - The sentiment in this verse is the same as in Psalm 56:6, except that the word "man" is used here instead of "flesh." The meaning, however, is the same. The idea is, that he would not be afraid of what "any man" - any human being - could do to him, if God was his friend.

In God have I put my trust,.... See Gill on Psalm 56:4;

I will not be afraid what man can do unto me; the same with flesh in Psalm 56:4, and is opposed to God, in whom he trusted; and it suggests that he was not, and would not, be afraid of the greatest of men, as well as of the meanest; See Gill on Psalm 56:4; Arama distinguishes between "flesh" and "man"; the former, he says, means the Philistines, and the latter Saul and his army.

In God have I put my trust: I will not be afraid what man can do unto me.

56:8-13 The heavy and continued trials through which many of the Lord's people have passed, should teach us to be silent and patient under lighter crosses. Yet we are often tempted to repine and despond under small sorrows. For this we should check ourselves. David comforts himself, in his distress and fear, that God noticed all his grievances and all his griefs. God has a bottle and a book for his people's tears, both the tears for their sins, and those for their afflictions. He observes them with tender concern. Every true believer may boldly say, The Lord is my helper, and then I will not fear what man shall do unto me; for man has no power but what is given him from above. Thy vows are upon me, O Lord; not as a burden, but as that by which I am known to be thy servant; as a bridle that restrains me from what would be hurtful, and directs me in the way of my duty. And vows of thankfulness properly accompany prayers for mercy. If God deliver us from sin, either from doing it, or by his pardoning mercy, he has delivered our souls from death, which is the wages of sin. Where the Lord has begun a good work he will carry it on and perfect it. David hopes that God would keep him even from the appearance of sin. We should aim in all our desires and expectations of deliverance, both from sin and trouble, that we may do the better service to the Lord; that we may serve him without fear. If his grace has delivered our souls from the death of sin, he will bring us to heaven, to walk before him for ever in light.