From His throne of grace, Christ pleads before Justice that sinners might be admitted into this kingdom. In themselves they have no right to enter. They deserve only death and destruction. He has made satisfaction for their sin and satisfied Justice on their behalf. Between God and the sinner, nothing remains but mercy-infinite mercy.
Grace means to be accepted in spite of being unacceptable.
It is to be fully known and fully forgiven. Those who try to make themselves worthy or more qualified to enter do in fact dig ditches before the door of the kingdom which they can never get across. Yet we must not get the idea that grace will tow a man to heaven against his consent. None enter but those who believe. If they were not sinners, it would not be a kingdom of grace.