Praise be to the Lord, for he has heard my cry for mercy. 7 The Lord is my strength and my shield; my heart trusts in him, and he helps me. My heart leaps for joy, and with my song I praise him.
8 The Lord is the strength of his people, a fortress of salvation for his anointed one. 9 Save your people and bless your inheritance; be their shepherd and carry them forever.
David is doing something today that we often forget to do. He is taking the time to praise God for hearing his prayer. He doesn't mention the particular situation he was praying for, but he praises God for hearing his cry for mercy. David needed mercy for the situation he was in. Mercy is getting what you don't deserve.
We see this had a profound effect on him. He says, "my heart leaps for joy." Why does our relationship with God get so strengthened and fortified when we are forced to cry out to God for mercy? It is at these times that we have no other place to go. As Simon Peter says, "To whom else should we go, you have the words of eternal life." John 6:68
Although we would never wish to have suffering or trials in our lives, they do draw us near to God. Since David, who was often in physical danger, realizes God is his "strength and shield". He says God is his "fortress"!
Where in your life do you need to cry out for mercy? Though it may not be a pleasant time, as you cry out to God he will hear your cry. In your trusting in Him it will strengthen your faith and might even give you joy. Make sure to return to give him praise and thanks!