How do you undo a promise to the Holy Bible?

Answer 1

For a Catholic, vows and swearing of oaths are highly discouraged unless one is making them for the greater glory of God after consultation with a spiritual direction. Otherwise, vows and oaths are considered invalid if done without a witness. The taking of rash oaths is considered sinful, for you have called God to witness something you are incapable of performing.

If it is more a matter of personal honour, that being you made a promise and wish to remain good to your word, it would be wise to consult with a priest. Sometimes you simply must admit it is beyond your ability. Perhaps you do some act or service to account for this one. A promise is either fulfilled, broken or absolved - a priest, who is the representative of God, is able to absolve you of promises that have been made to God or upon sacred objects on occasions.