Perhaps you've seen "Revenant," the 2017 movie, starring Leonard DiCaprio?  Loosely based on the life of Hugh Glass, a Western "mountain man" of the early nineteenth century, "Revenant" is a study in earthly and transcendent morality.

     Briefly, the plot is how, after he is badly mauled in a grizzly bear attack, Glass is left for dead by his companions who, after reaching the safety of an American fort, lie about how they left Glass in order to obtain a larger share of the money due them.  In the months following his abandonment, Glass, through sheer perseverance of will, along with a fortunate encounter with a friendly Indian, manages to "resurrect" himself and make his way to the fort.
     When once he as at the fort and learns that the one who left him for dead has recently fled the justice due him, Glass sets in pursuit.  As the movie draws to a close, Glass and the unscrupulous trader are locked in a fight to the death.  However, when Glass finally gains the upper hand and prepares to end the trader's life, he remembers something his Indian benefactor told him.  "It is for the Creator to seek revenge."
     So he lets his opponent go.  However, as his antagonist drifts into the stream by which they were fighting, he lands in the hands of a group of Indians traveling on the opposite bank.  He is summarily scalped and killed.  Glass, because one of the women in the group recognizes him as the man who earlier rescued her from a rape attack, is spared.
     If we were to frame this scenario in earthly terms, most of us would respond that, yes, Glass should kill his enemy.  If we were to set it in a transcendent framework, one invested in the presence of a Creator, however, we could not.  Satisfying though revenge may be, it will never satisfy the variegated moral contusions of our human heart.  We exact justice only imperfectly.
     When Martin Luther King, Jr., a person deeply committed to God, observed that, "The arc of the moral universe is long, but it bends toward justice," he expressed this same thought:  we cannot do morality without a just God.