Charles H. Spurgeon on Psalms 42:3

My tears have been my meat day and night. Salt meats, but healthful to the soul. When a man comes to tears, constant tears, plenteous tears, tears that fill his cup and trencher, he is in earnest indeed. As the big tears stand in the stag's eyes in her distress, so did the salt drops glitter in the eyes of David. His appetite was gone, his tears not only seasoned his meat, but became his only meat, he had no mind for other diet. Perhaps it was well for him that the heart could open the safety valves; there is a dry grief far more terrible than showery sorrows. His tears, since they were shed because God was blasphemed, were "honourable dew, "drops of holy water, such as Jehovah putteth into his bottle. While they continually say unto me, Where is thy God? Cruel taunts come naturally from coward minds. Surely they might have left the mourner alone; he could weep no more than he did —it was a supererogation of malice to pump more tears from a heart which already overflowed. Note how incessant was their jeer, and how artfully they framed it! It cut the good man to the bone to have the faithfulness of his God impugned. They had better have thrust needles into his eyes than have darted insinuations against his God. Shimei may here be alluded to who after this fashion mocked David as he fled from Absalom. He roundly asserted that David was a bloody man, and that God was punishing him for supplanting Saul and his house; his wish was father to his thought. The wicked know that our worst misfortune would be to lose God's favour, hence their diabolical malice leads them to declare that such is the case. Glory be to God, they lie in their throats, for our God is in the heavens, aye, and in the furnace too, succouring his people.