To sum up then this system aimed at securing the advantages both of the socialist view and of the individualistic view, while avoiding the evils of both. Private enterprise was encouraged, by the individual being guaranteed possession of his land against any other individual; while public spirit and a regard for general interests were promoted by the restrictions which limited the private ownership. Further, and more important still, the whole relation of the nation and of the individual to the land was raised out of the merely sordid region of material gain into the spiritual and moral region, by the principle that Yahweh their God alone had full proprietary rights over the soil. All were "sojourners" with Him. He had promised this land to their fathers as the place wherein He should specially reveal Himself to them. Here, communion with Him was to be established, and to each household there had been assigned by Yahweh a special portion of it, which it would be equally a sin and an unspeakable loss to part with. Compulsion alone could justify such a surrender; and the completed legislation, whatever its date, and even if it remained always an unrealised ideal, shows how determined the effort was to secure the perpetuity of the tenure in the original hands. The ideal of Israelite life was consequently that the land should remain in the hands of the hereditary owners, and that the main support of all the people should be agricultural labour.[98] [98] The questions connected with the jubilee year are numerous and intricate, and it may be for ever impossible, from lack of data, to decide at what period in Israelite history it originated, or whether it was ever actually observed; but it undoubtedly expressed the spirit of the Israelite legislation and customary law at all times. It is the natural culmination of tendencies and ideas which were always present. That it is not mentioned in Deuteronomy at all is surprising, if it had been previously to Manasseh's day embodied either in custom or in law; yet, on the other hand, there are references in Ezekiel and other exilic books which are almost unintelligible except on the supposition that the jubilee year was a perfectly well-known institution (cf. Jer. xxxiv. 8 ff.; Ezek. vii. 12 f.; Ezek. xlvi. 16 ff.; Isa. lxi. 1 ff.). It is referred to in a merely allusive way, which implies that every hearer or reader of the prophetic warnings would know at once the full scope and meaning of the reference. Now, had the jubilee year been unknown before the Exile, had it been introduced by the author of Lev. xxv. just before Ezekiel, no such assumption could have been made. It would, therefore, seem necessary to suppose that the ordinance for a jubilee year must have existed in pre-exilic time; for, strange as Deuteronomy's silence in regard to it is, the _argumentum e silentio_ cannot weigh against indications of a positive kind, were