The purpose of God to bring Israel into Egypt was accomplished by the unconscious agency of Joseph's natural affection for his kindred. Tenderness towards home is usually increased by residence in a foreign land; for absence, like a little death, sheds a halo round those separated from us. But Joseph could not as yet either re-visit his old home or invite his father's family into Egypt. Even, indeed, when his brothers first appeared before him, he seems to have had no immediate intention of inviting them as a family to settle in the country of his adoption, or even to visit it. If he had cherished any such purpose or desire he might have sent down wagons at once, as he at last did, to bring his father's household out of Canaan. Why, then, did he proceed so cautiously? Whence this mystery, and disguise, and circuitous compassing of his end? What intervened between the first and last visit of his brethren to make it seem advisable to disclose himself and invite them? Manifestly there had intervened enough to give Joseph insight into the state of mind his brethren were in, enough to satisfy him they were not the men they had been, and that it was safe to ask them and would be pleasant to have them with him in Egypt. Fully alive to the elements of disorder and violence that once existed among them, and having had no opportunity of ascertaining whether they were now altered, there was no course open but that which he adopted of endeavouring in some unobserved way to discover whether twenty years had wrought any change in them. For effecting this object he fell on the expedient of imprisoning them, on pretence of their being spies. This served the double purpose of detaining them until he should have made up his mind as to the best means of dealing with them, and of securing their retention under his eye until some display of character might sufficiently certify him of their state of mind. Possibly he adopted this expedient also because it was likely deeply to move them, so that they might be expected to exhibit not such superficial feelings as might have been elicited had he set them down to a banquet and entered into conversation with them over their wine, but such as men are surprised to find in themselves, and know nothing of in their lighter hours. Joseph was, of course, well aware that in the analysis of character the most potent elements are only brought into clear view when the test of severe trouble is applied, and when men are thrown out of all conventional modes of thinking and speaking.