They repay me evil for good and leave my soul forlorn.
Forlorn is a great word here. When a friend misjudges your actions, and spreads it around as truth, or when you do something kind, and the person throws it back in your face – forlorn definitely describes the condition of your heart.
vs. 27 The Lord be exalted who delights in the well-being of his servant. But, we know the One who delights in our well-being.
vs. 22 O Lord, you have seen this; be not silent. We know the One Who sees it all.
vs. 10 Who is like you, O Lord: You rescue the poor from those too strong for them. We know, and are loved by, the Great Rescuer of our souls. He an be trusted to make a forlorn heart fill with joy again.