Charles H. Spurgeon on Psalms 141:5

Oil, which shall not break my head. When I first took this text in hand, this seemed unto me a very strange and uncouth expression. If the Psalmist had said, It shall be a stone that shall not break my head, etc., we had easily understood him; but to speak of an oil, or a balm, which we know to be so soft, so supple, so lithe and gentle an ointment, that he should speak of breaking his head with oil, it is strange. I confess it troubled me a while, till at length I conceived it might be spoken by contraries; as when a physician gives a patient some pectoral, or cordial, and saith, Take this, it will not hurt you; his meaning is, it will help and do him good. So this oil shall not break my head;that is, it shall heal it, being broken by my own corruption, by Satan's temptations, and by the evil influence of such as flatter me in my sins. —John Gore.