1. How this possession shall be gained, and the opposition given to it got over (v. 18): The house of Jacob shall be a fire, and the house of Joseph a flame, for their God is, and will be, a consuming fire; and the house of Esau shall be for stubble, easily devoured and consumed by this fire. This is fulfilled, (1.) In the conversion of multitudes by the grace of Christ; the gospel, preached in the house of Jacob and Joseph, and there owned and professed, shall be as a fire and a flame to melt and to soften hard hearts, to burn up the dross of sin and corruption, that they may be purified and refined with the spirit of judgment and the spirit of burning. Christ, when he comes, shall be as a refiner's fire, Mal. iii. 1, 2. (2.) In the confusion of all the impenitent implacable enemies of the gospel of Christ, that oppose it and do all they can to hinder the setting up of the kingdom of the Messiah by it. The gospel day is a day that burns like an oven, in which all the proud, and all that do wickedly, shall be a stubble, Mal. iv. 1. Jacob and Joseph shall be as a fire and a flame; for those that meddle with them, to do them hurt, will find that they do so at their peril; they shall be to them as a torch of fire in a sheaf, Zech. xii. 6. The word of God in the mouth of his ministers is said to be like fire, and the people as wood to be devoured by it, Jer. v. 14. And the man of sin is to be consumed by the breath of Christ's mouth, 2 Thess. ii. 8. Those that are not refined as gold by fire of the gospel shall be consumed as dross by it; for it will be a savour either of life or of death. When idols and idolatry were abolished, and the wealth and power of nations were brought into the service of Christ and his gospel, and the spoils of the strong man armed were divided by him that was stronger than he, then the house of Jacob and Joseph devoured the house of Esau, so that there was none of them left remaining. This the Lord spoke by his prophets, and this he did by his apostles.