If one does not make peace on the way and become freed one’s adversary, then one will be judged and thrown into a prison out of which he will never gain release. What one does in this life determines the verdict of the judge, who is Christ. Only Jesus has the power to forgive us our debts, no matter how large or small, for without His forgiveness we are powerless to be released from our debts (Origen).
The Word of God is our opponent if we commit a sin. In whatever sins you wish to follow your own will, the Word of God says to you, do not do that. It is the enemy of your will until it becomes the assurance of your salvation (Augustine).