Charles H. Spurgeon on Psalms 106:43

They were brought low for their iniquity. Sin is of a weakening and impoverishing nature; it has weakened all mankind, and taken from them their moral strength to do good; and has brought them to poverty and want; to be beggars on the dunghill; to a pit wherein is no water; and left them in a hopeless and helpless condition; yea, it brings the people of God often times after conversion into a low estate, when God hides his face because of it, temptations are strong, grace is weak, and they become lukewarm and indifferent to spiritual things. John Gill.