divine forgiveness

One must not mistake divine forgiveness for indulgence or complacency. There is a limit at which forbearance ceases to be a blessing. Forgiveness is neither absolute nor unconditional. We may forgive the criminal; is it right to forgive the crime? I may forgive a wrong done to me, but do I have the right to forgive a wrong done to others? Unconditional forgiveness may be found in Pandora's box, a fine incentive to vice. Divine anger is a reminder that man is in need of forgiveness, and that forgiveness must not be taken for granted. The Lord is long-suffering, compassionate, loving, and faithful, but He is also demanding, insistent, terrible, and dangerous.
--Abraham Heschel, The Prophets

Grace is not cheap. N.T.