Freedom in Christ

how is it that we are washed clean of all our guilt and condemnation through the blood of
Jesus, but we can't seem to forgive ourselves and continue to live in our own condemnation?
Is that just the enemy trying to keep us down, or is it something we hold on to because our
freedom in Christ seems to good to be true sometimes? Am I the only one who feels this way?
I think I have a lot to work on in that department.