You can't take back the words you said, or unsee what you saw. You can't ever undo something. You can never take it back once you did it. But we can change how we are. And that is something. You are forgive in Gods eyes. But do you forgive yourself in your eyes?

Ephesians 2:8

"For it is by grace you have been saved, through faith-and this is not from yourselves, it is the gift of God."