In the remaining verses of the chapter, vv. 10-19, we have a warning against neglect and forgetfulness of their God, and an indication of the circumstances under which it would be most difficult to remain true to Him. These are uttered entirely from the Mosaic standpoint, and are among the passages which it is most difficult to reconcile with the later authorship; for there would appear to be no motive for the later writer to go back upon the exceptional circumstances of the early days in Canaan. His object must have been to warn and guide and instruct the people of _his_ time in the face of their difficulties and temptations, to adapt Mosaic legislation and Mosaic teaching to the needs of his own day. Now on any supposition he must have written when all conquest on Israel's part had long ceased. It is most probable too that in his day the prosperity of his people was on the wane. They were not looking forward to a time of special temptation from riches; rather they were dreading expatriation and decay. Consequently this reference to the ease with which they became rich by occupying the cities and villages and farms of those they had conquered is quite out of place, unless we are to regard the author as a skilled and artistic writer who deliberately set himself to reproduce in all respects the mind and thoughts of a man of an earlier day, as Thackeray, for instance, does in his _Henry Esmond_. But that is not credible; and the explanation is that given in Chapter I., that the addresses here attributed to Moses are free reproductions of earlier traditions or narratives concerning what Moses actually said. If we know anything about Moses at all, it is in the highest degree probable that he left his people some parting charge. He longed to pass the Jordan with them. He could not fail to see that an immense revolution in their habits and manner of life was certain to occur when they entered the promised land. That must have appeared to him fraught with varied dangers, and words of warning and instructions would rush even unbidden to his lips.
There can be no doubt, at any rate, that this passage is true to human nature in regarding the sudden acquirement of great and goodly cities which they did not build, and houses full of good things which they filled not, and cisterns hewn out which they did not hew, vineyards and olive trees which they did not plant, as a great temptation to forgetfulness of God. At all times prosperity, especially if it come suddenly, and without being won by previous toil and self-denial, has tended to deteriorate character. When men have no changes or vicissitudes, then they fear not God. It is for help in trouble when the help of man is vain, or for a deliverance in danger, that average men most readily turn to God. But when they feel fairly safe, when they have raised themselves, as they think, "beyond all storms of chance," when they have built up between themselves and poverty or failure a wall of wealth and power, then the impulse that drives them upward ceases to act. It becomes strangely pleasant, and it seems safe, to get rid of the strain of living at the highest attainable level, and with a sigh of relief men stretch themselves out to rest and to enjoy. These are the average men; but there are some in every age, the elect, who have had the love of God shed abroad in their hearts, who have had such real and intimate communion with God that separation from Him would turn all other joys into mockery. They cannot yield to this temptation as most do, and in the midst of wealth and comfort keep alive their aspirations. In Israel these two classes existed; and to the former, _i.e._ to the great bulk of both rulers and people, the stimulus administered by the conquest to the material side of their nature must have been potent indeed.