Mercy to accept what we do well, and grace to keep us from doing ill, are the two things which we are here taught by David’s example to pray to God for. I. David loved prayer, and he begs of God that his prayers might be heard and answered, Ps. 141:1 , 2 . David cried unto God . His crying denotes fervency in prayer; he prayed as one in earnest. His crying to God denotes faith and fixedness in pra...