I think that many Christians slide off the narrow path into a sea of regret far too often. Ultimately, this reflects a poor grasp of the Gospel. I will be addressing this somewhat on Sunday night at GFC.
The human heart is heretical by nature.Popular religious beliefs should be checked carefully against the word of God, for they are almost certain to be wrong.
Legalism, for instance, is natural to the human heart. Grace in its true New Testament meaning is foreign to human reason, not because it is contrary to reason but because it lies beyond it. The doctrine of grace had to be revealed; it could not have been discovered.
The essence of legalism is self-atonement. The seeker tries to make himself acceptable to God by some act of restitution, or by self-punishment or the feeling of regret. The desire to be pleasing to God by self-effort is not, for it assumes that sin once done may be undone, an assumption wholly false.
Long after we have learned from the scriptures that we cannot by fasting, or the wearing of hair shirt or the making of many prayers, atone for the sins of the soul, we still tend by a kind of pernicious natural heresy to feel that we can please God and purify our souls by the penance of perpetual regret.
This latter is the Protestant's unacknowledged penance. Though he claims to believe in the doctrine of justification by faith he still secretly feels that what he calls "godly sorrow" will make him dear to God. Though he may know better he is caught in the web of a wrong religious feeling and betrayed.
There is indeed a godly sorrow that worketh repentance and it must be acknowledged that among us Christians this feeling is often not present in sufficient strength to work real repentance; but the persistence of this sorrow till it becomes chronic regret is neither right nor good. Regret is a kind of frustrated repentance that has not been quite comsummated. Once the soul has turned from all sin and committed itself wholly to God there is no longer any legitimate place for regret. When moral innocence has been restored by the forgiving love of God the guilt may be remembered, but the sting is gone from the memory. The forgiven man knows that he has sinned, but he no longer feels it.
The effort to be forgiven by works is one that can never be completed because no one knows or can know how much is enough to cancel out the offence; so the seeker must go on year after year paying on his moral debt, here a little, there a little, knowing that he sometimes adds to his bill much more than he pays. The task of keeping books on such transaction can never end, and the seeker can only hope that when the last entry is made he may be ahead and the account fully paid. This is quite the popular belief, this forgiveness by self-effort but it is natural heresy and can last only betray those who depend upon it.
It may be argued that the absence of regret indicates a low and inadequate view of sin, but the exact opposite is true. Sin is frightful, so destructive to the soul that no human thought or act can in any degree diminish its lethal effects. Only God can deal with it successfully; only the blood of Christ can cleanse it from the pores or the spirit. The heart that has been delivered from this dread enemy feels not regret but wondrous relief and unceasing gratitude.
The returned prodigal honours his father more by rejoicing than by repining. Had the young man in the story had less faith in his father he might have mourned in a corner instead of joining in the festivities. His confidence in the loving-kindness of his father gave him the courage to forget his chequered past.
Regret frets the soul as tension frets the nerves and anxiety the mind. I believe that the chronic unhappiness of most Christians may be attributed to a gnawing uneasiness lest God had not fully forgiven them, or the fear that He expects as the price of His forgiveness some sort of emotional penance which they have not furnishes. A our confidence in the goodness of God mounts out anxieties will diminish and our moral happiness rise in inverse proportion.
Regret may be more than a form of self-love. A man may have such a high regard for himself that any failure to live up to his own image of himself disappoints him deeply. He feels that he has betrayed his better self by his act of wrongdoing, and even if God is willing to forgive him he will not forgive himself. Sin brings to such a man a painful loss of face that is not soon forgotten. He becomes permanently angry with himself by going to God frequently with petulant self-accusations. This state of mind crystallises finally into a feeling of chronic regret which appears to be proof of deep penitence but is actually proof of deep self-love.
Regret for a sinful past will remain until we truly believe that for us in Christ that sinful past no longer exists. The man in Christ has only Christ's past and that is perfect and acceptable to God. In Christ He died, in Christ he rose, and in Christ he is seated within the circe of God's favoured ones. He is no longer angry with himself because he is no longer self-regarding, but Christ-regarding; hence there is no place for regret.