_A new heart also will I give you, and a new spirit will I put within you; and I will take away the stony heart out of your flesh, and I will give you an heart of flesh._--Ezekiel xxxvi., 26. As in a machine where the parts all fit each other, and, bathed in oil, move without din or discord, the most perfect harmony reigns throughout the kingdom of grace. Jesus Christ is the "wisdom," as well as the "power" of God; nor in this kingdom is anything found corresponding to the anomalies and incongruities of the world lying without. There we sometimes see a high station disgraced by a man of low habits; while others are doomed to an inferior condition, who would shine like gilded ornaments on the very pinnacles of society. That beautiful congruity in Christ's kingdom is secured by those who are the objects of saving mercy being so renewed and sanctified that their nature is in harmony with their position, and the man within corresponds to all without. Observe how this property of "new" runs through the whole economy of grace. When mercy first rose upon this world, an attribute of Divinity appeared which was new to the eyes of men and angels. Again, the Savior was born of a virgin; and He who came forth from a womb where no child had been previously conceived, was sepulchered in a tomb where no man had been previously interred. The infant had a new birthplace, the crucified had a new burial-place. Again, Jesus is the mediator of a new covenant, the author of a new testament, the founder of a new faith. Again, the redeemed receive a new name; they sing a new song; their home is not to be in the old, but in the new, Jerusalem, where they shall dwell on a new earth, and walk in glory beneath a new heaven. Now it were surely strange, when all things else are new, if they themselves were not to partake of this general renovation. Nor strange only, for such a change is indispensable. A new name without a new nature were an imposture. It were not more an untruth to call a lion a lamb, or the rapacious vulture by the name of the gentle dove, than to give the title of sons of God to the venomous seed of the serpent. Then, again, unless man received a new nature, how could he sing the new song? The raven, perched on the rock, where she whets her bloody beak, and impatiently watches the dying struggles of some unhappy lamb can not tune her croaking voice to the rich, mellow music of a thrush; and, since it is out of the abundance of the heart that the mouth speaketh, how could a sinner take up the strain and sing the song of saints? Besides, unless a man were a new creature, he were out of place in the new creation. In circumstances neither adapted to his nature, nor fitted to minister to his happiness, a sinner in heaven would find himself as much out of his element as a finny inhabitant of the deep, or a sightless burrower in the soil, beside an eagle, soaring in the sky, or surveying her wide domain from the mountain crag.