You will never believe that divine grace is all you need until it is all you have. Sometimes, the human expression of that grace is taken away and all we are left with is our pain. It is at that exact point, that we have to turn to Him and away from them. This post by R.C. Sproul is required reading for Christians:
“The dark night of the soul. This phenomenon describes a malady that the greatest of Christians have suffered from time to time. It was the malady that provoked David to soak his pillow with tears. It was the malady that earned for Jeremiah the sobriquet, “The Weeping Prophet.” It was the malady that so afflicted Martin Luther that his melancholy threatened to destroy him.”