David prays and looks to God for help, especially when he is surrounded with enemies. In fact in Psalm 57, in the very first verse, he repeats the request twice because he is fully aware of how great the danger he is in, and not just twice but with intensity and those two things implied just how much hope and trust he had in God’s mercy.
His argument – God has helped me in my past distresses and that is why he has hope in his present situation.
David supports himself with faith and hope in God, and prayer to Him.
This is not to earn the mercy of God; mercy can’t be earned. He said it to tell God that He was David’s only hope. His soul trusted in God and nothing else; there was nothing else to trust in.
“How can the Lord be unmerciful to a trustful soul? Our faith does not deserve mercy, but it always wins it from the sovereign grace of God when it is sincere.” – Spurgeon
So what will I do – I too will put my life in God’s hand – my immortal spirit knows no other portion than God. Even when I need a speedy answer – immediate relief – I can expect the mercy and grace of God. My great act of faith is to only trust God in such circumstances – not just a profession of trust – but one that is sincere – all my heart and all my soul – and that makes a reason or argument for mercy seeing that His mercy encourages my faith and hope. I believe the Lord takes pleasure in those that hope and trust in Him.
Be merciful to me, O God, be merciful to me, for in you my soul takes refuge; in the shadow of your wings I will take refuge, until the destroying storms pass by. I cry to God Most High, to God who fulfills his purpose for me.– Psalm 57:1-2