As for you, O Lord, you will not restrain your mercy from me;When I think of God restraining something, I usually think of God restraining his wrath, or holding back the wickedness of men, so when I came upon this line from Psalm 40, I found it to be worth meditation. Here David is praising the Lord by confessing that he "will not restrain" his mercy. Though I daily struggle with sin, be it mine or another's, the mercy of God will not be withheld from me. This mercy, taking shape in the love and faithfulness of God, is David's rock and salvation. Not in his own ways and means, nor even in his love for God does David find security. In God alone do I have my justification.
Your steadfast love and your faithfulness will ever preserve me!