9. Moreover, the believer would look on Jesus as standing engaged and obliged to carry on this work, both receiving them as for this end, from the Father. Hence we are said "to be chosen in him before the foundation of the world, that we should be holy," &c. Eph. i. 4; and as dying for them. For he gave himself for the church, that he might sanctify and cleanse it, that he might present it to himself a glorious church, that it should be holy, Eph. v. 25-27. He hath reconciled them, in the body of his flesh, through death, to present them holy, Col. i. 2, 22. So that the noble covenant of redemption may found the certain hope and expectation of the believer, upon a double account: (1.) Upon the account of the Father's faithfulness, who promised a seed to Jesus, viz. such as should be his children, and so be sanctified through him, and that the pleasure of the Lord, which in part is the work of sanctification, should prosper in his hand. And, (2.) Upon the account of Christ's undertaking and engaging, as is said, to bring his sons and daughters to glory, which must be thought sanctification; for without holiness no man shall see God. And they must look like himself, who is a holy head, a holy husband, a holy captain; and therefore they must be holy members, a holy spouse, and holy soldiers. So that he standeth engaged to sanctify them by his Spirit and word, and therefore is called the sanctifier, Heb. ii. 11; "for both he that sanctifieth, and they who are sanctified, are all one." Yea, their union with Christ layeth the foundation of this; for "being joined to the Lord, they become one Spirit," 1 Cor. vi. 17, and are animated and quickened by one and the same Spirit of life and grace, and therefore must be sanctified by that Spirit.