(5.) God assures them of his protection in their trouble, and a glorious deliverance out of it in due time, v. 6. Being sent into captivity for their good, they shall not be lost there; but it shall be with them as it is with gold which the refiner puts into the furnace. [1.] He has his eye upon it while it is there, and it is a careful eye, to see that it sustain no damage: "I will set my eyes upon them for good, to order every thing for the best, that all the circumstances of the affliction may concur to the answering of the great intention of it." [2.] He will be sure to take it out of the furnace again as soon as the work designed upon it is done: I will bring them again to this land. They were sent abroad for improvement awhile, under a severe discipline; but they shall be fetched back, when they have gone through their trial there, to their Father's house. [3.] He will fashion his gold when he has refined it, will make it a vessel of honour fit for his use; so, when God has brought them back from their trial, he will build them and make them a habitation for himself, will plant them and make them a vineyard for himself. Their captivity was to square the rough stones and make them fit for his building, to prune up the young trees and make them fit for his planting.