Malachi 1:10

Here again, the Lord showeth the unworthiness and ungraciousness of man, and his unprofitableness to God. All which, if I mistake not, is introduced with a view to heighten the abundant grace and goodness of God. It is as if the Lord had said, though none of you will so much as open the doors of my house without a reward, yet my love, and the blessings I give are all free, and without restraint, yea, against all undeservings.