There is no inconsistency in God's commanding us not to take upon ourselves what belongs to Him alone. For to execute vengeance belongs to none but Him who is Lord of all; for when the powers of the world rightly accomplish this end, God himself does it who appointed them for the purpose.
Anselm of CanterburyA Prayer of Anselm My God, I pray that I may so know you and love you that I may rejoice in you. And if I may not do so fully in this life let me go steadily on to the day when I come to that fullness . . . Let me receive That which you promised through your truth, that my joy may be full.
Anselm of Canterbury