Charles H. Spurgeon on Psalms 30:10

Hear, O Lord, and have mercy upon me. A short and comprehensive petition, available at all seasons, let us use it full often. It is the publican's prayer; be it ours. If God hears prayer, it is a great act of mercy; our petitions do not merit a reply. Lord, be thou my helper. Another compact, expressive, ever fitting prayer. It is suitable to hundreds of the cases of the Lord's people; it is well becoming in the minister when he is going to preach, to the sufferer upon the bed of pain, to the toiler in the field of service, to the believer under temptation, to the man of God under adversity; when God helps, difficulties vanish. He is the help of his people, a very present help in trouble. The two brief petitions of this verse are commended as ejaculations to believers full of business, denied to those longer seasons of devotion which are the rare privilege of those whose days are spent in retirement.