Charles H. Spurgeon on Psalms 106:33

He spake unadvisedly with his lips. The Lord desires him to address the rock, but Moses speaks to Israel. God wishes him to speak a word to the inanimate stone, and Moses strikes it twice. God still is willing that the people shall remain as his inheritance, but Moses evidently treats them with ill will and much offensiveness. God wishes to relieve, and give refreshing to the people in their thirst, and Moses is selected to cooperate with him in all such joy; but mark how, on this very day, a deep discord between God's inclination and the mind of Moses shows itself. God is inclined to grant forgiveness, —Moses inclines to punishment; before, the very opposite seemed to prevail. God is forbearing, —Moses, filled with bitterness; God seeks to glorify his grace, —with Moses, self, not God, comes into prominence. "Must we", —not, "must the Lord", —but "must we fetch you water out of this rock?" We see now, in this prophet, strong at other times, the first plain indications of decay and weariness. He has grown tired (and truly it should not seem strange, for which of us could have sustained a struggle such as his for half the time?) of carrying these stubborn children any longer now. This man, so truly great, has never for an instant hitherto forgotten his own dignity in presence of all Israel; but now, he is no longer master of himself. J.J. Van Oosterzee.