God is compassionate, and He remembers that we're dust. You still remember the exact words of a text you sent in 2011. You wince every single time. You can't recall your own license plate, but that text has a lifetime lease in your head.
David chose his picture well. Travel north and you eventually reach the pole and start heading south. Travel east and you never stop going east. The distance has no end. That's how far God has moved your sin from you. Verse 14 is quietly tender: "he knows how we are formed, he remembers that we are dust." Your weakness never surprises God.
He made you, and He knows exactly what you're made of. God removed it. You don't have to keep driving back to visit it.
Pray in your own words
You can't remember your license plate, but you can recite the text you wish you had never sent in 2011. Your memory has made some peculiar staffing decisions.
What forgiven failure do I keep revisiting as though replaying it pays something back?
You can take this slowly.