The world is filled with people wanting to know they are forgiven and in right standing with God. Even professing believers in Jesus may struggle in fear and uncertainty. The foundation of the Christian religion is sometimes a confusing mishmash of works and faith which often puts the focus on behavior and a modernized version of law keeping.
Just exactly what is it that changed when Jesus shed blood and was declared to be the one and only eternal High Priest? Something significant changed and it had to do with the old Mosaic law of commandments being set aside, nullified, cancelled, abolished and declared obsolete. It resulted in a change of law which could not bring perfection—not an amendment to the existing law—but a removal of something that was to be completely replaced, resulting in Jesus becoming the guarantee of a better covenant.
If a believer in Christ becomes tempted to ask God for more forgiveness over and over, this is a sign they have not yet come to realize the plenitude of God's forgiveness that came through the one sacrifice of Jesus. It implies a lack of confidence in His shed blood. But since this is what the bulk of the religious message has coached people to do ... habits and uncertainties can be a challenge to break, especially when approaching these things from an old covenant perspective.
There were many priests under the Mosaic law who daily offered animal sacrifices time after time, yet never taking away sins. They could only provide a temporary covering. Sins kept happening so the blood of bulls and goats kept rolling down the sacrificial conveyor belt. And now the good news ... But the one High Priest (Jesus) "having offered one sacrifice for sins for all time, sat down at the right hand of God." Why was this Priest able to sit down after the sacrifice of Himself? Because the issue of forgiveness was completed. He finished the job.
