For in thee, O Lord, do I hope - This shows the reason or ground of his patience. He committed his whole cause to God. He believed that God would take care of his reputation, and that he would vindicate him. See Psalms 37:5-6. He had no doubt that He would protect his character, and that, notwithstanding the reproaches of his enemies, his true character would at last be made to shine forth, so that all men would see that he had been unjustly aspersed. The exact idea here is expressed, and the sentiment was beautifully and perfectly illustrated, in what is said of the Lord Jesus: “Who, when he was reviled, reviled not again; when he suffered, he threatened not; but committed himself to him that judgeth righteously,” 1 Peter 2:23.
Thou wilt hear, O Lord my God - Margin, as in Hebrew: “answer.” The idea is, that God would answer his prayers, and that his character would, in answer to those prayers, be set right before the world.