I. See here what David prays for. Many excellent petitions he here puts up, to which if we do but add, “for Christ’s sake,” they are as evangelical as any other. 1. He prays that God would cleanse him from his sins and the defilement he had contracted by them (Ps. 51:7): “ Purge me with hyssop ; that is, pardon my sins, and let me know that they are pardoned, that I may be restored to those privil...