O Lord God of my salvation. This is a hopeful title by which to address the Lord, and it has about it the only ray of comfortable light which shines throughout the Psalm. The writer has salvation, he is sure of that, and God is the sole author of it. While a man can see God as his Saviour, it is not altogether midnight with him. While the living God can be spoken of as the life of our salvation, our hope will not quite expire. It is one of the characteristics of true faith that she turns to Jehovah, the saving God, when all other confidences have proved liars unto her. I have cried day and night before thee. His distress had not blown out the sparks of his prayer, but thickened them into a greater ardency, till they burned perpetually like a furnace at full blast. His prayer was personal —whoever had not prayed, he had done so; it was intensely earnest, so that it was correctly described as a cry, such as children utter to move the pity of their parents; and it was unceasing, neither the business of the day nor the weariness of the night had silenced it: surely such entreaties could not be in vain. Perhaps, if Heman's pain had not been incessant his supplications might have been intermittent; it is a good thing that sickness will not let us rest if we spend our restlessness in prayer. Day and night are both suitable to prayer; it is no work of darkness, therefore let us go with Daniel and pray when men can see us, yet, since supplication needs no light, let us accompany Jacob and wrestle at Jabbok till the day breaketh. Evil is transformed to good when it drives us to prayer. One expression of the text is worthy of special note; "before thee" is a remarkable intimation that the Psalmist's cries had an aim and a direction towards the Lord, and were not the mere clamours of nature, but the groanings of a gracious heart towards Jehovah, the God of salvation. Of what use are arrows shot into the air? The archer's business is to look well at the mark he drives at. Prayers must be directed to heaven with earnest care. So thought Heman —his cries were all meant for the heart of his God. He had no eye to onlookers as Pharisees have, but all his prayers were before his God.