It is difficult to extract this psalm from the Christian tradition that surrounds it since many of its words were fulfilled by Christ on the cross. But it is important to see the psalm in its original context. David is being derided and scoffed because he dares to believe that the LORD will deliver him. Indeed, he boasts that the LORD will be worshipped by all who cannot keep themselves alive, but go down to the dust. When Jesus quoted this psalm on the cross, he was not just choosing words to express his anxiety. He was testifying to the reality of the God who raises the dead. Even in his darkest hour, he saw the future, and it held hope. God will remember his own.
LORD, in our dark hours, may we always remember that you will remember us.