“This faithfulness of God is of the utmost practical significance to the people of God. It is the ground of their confidence, the foundation of their hope, and the cause of their rejoicing. It saves them from the despair to which their own unfaithfulness might easily lead, gives them courage to carry on in spite of their failures, and fills their hearts with joyful anticipations, anew when they are deeply conscious of the fact they have forfeited all the blessings of God.”
–Louis Berkhof, Systematic Theology, p. 70 Hat tip to Tulip girl