God must always be just; He is not obligated to always be merciful | Clip from Divine Retribution
God must, in all circumstances, be just. If He were to be unjust, even for a moment, He would cease to be God. But He can choose, of His own volition, to be merciful. Even in the merciful forgiveness of sinners, justice was doled out on Christ. Let this light a fire in your soul to pursue Him ever more today.