But, as has already been remarked, this law was elastic in more important matters; often, even when it seems to legislate, it is only setting up ideals of conduct. Before we leave this subject an example should be given, and the law of war may serve, especially if we compare it with the corresponding section of Manu. The provisions in Deuteronomy chap. xx. according to which on the eve of a battle the officers should proclaim to the army that any man who had built a new house and had not dedicated it, or who had planted a vineyard and had not yet used the fruit of it, or who had betrothed a wife and not yet taken her, or who was afraid, should retire from the danger, as also the provisions that forbid the destruction of fruit-trees belonging to a besieged city, cannot have been meant as absolute laws. Yet that is no ground for supposing that they could have been introduced only after Israel, having ceased to be a sovereign state, waged no war, and that consequently they are interpolations in the original Deuteronomy. For the similar provisions of the laws of Manu were given while kings reigned, and were addressed to men constantly engaged in war. Yet this is what we find: "When he (the king) fights with his foes in battle, let him not strike with weapons concealed (in wood), nor with (such as are) barbed, poisoned, or the points of which are blowing with fire. Let him not strike one who (in flight) has climbed on an eminence, nor a eunuch, nor one who joins the palms of his hands (in supplication), nor one (who flees) with flying hair, nor one who sits down, nor one who says 'I am thine,' nor one who sleeps, nor one who has lost his coat of mail, nor one who is naked, nor one who is disarmed, nor one who looks on without taking part in the fight, nor one who is fighting with another foe, nor one whose weapons are broken, nor one afflicted (with sorrow), nor one who has been grievously wounded, nor one who is in fear, nor one who has turned to flight; but in all these cases let him remember the duty (of honourable warriors)." With an exact and unremitting obligation to observe these precepts war would be impossible, and we may be sure that in neither case were they meant in that sense. They simply set forth the conduct which a chivalrous soldier would desire to follow, and would on fitting occasions actually follow; but by no means what he must do, or else break with his religion. Only by hypotheses like these can the form and the character of such laws be properly explained, and if we keep them constantly in mind, some at least of the difficulties which result from a comparison of the law and the histories may be mitigated.
Such being the character of the Deuteronomic code, the question has been raised whether its introduction and acceptance by Josiah was not a falling away from the spirituality of ancient religion. Many modern writers, supported by St. Paul's _dicta_ concerning the law, say that it was. Indeed the very mention of law seems to depress writers on religion in these days, and Deuteronomy appears to be to them a name of fear. But whatever tendencies of modern thinking may have brought this about, it is nevertheless true that experience embodied in custom and law is the kindly nurse, not the deadly enemy, of moral and spiritual life. Without law a nation would be absolutely helpless; and it is inconceivable that at any stage of Israel's history they were without this guide and support. As we have seen, they never were. First they had customary law; then along with that short special codes, _e.g._ the Book of the Covenant and the Deuteronomic code; and even when the whole Pentateuchal law as we have it had been elaborated, a good deal must still have been left to custom. Consequently there was nothing so startling and revolutionary in the introduction of Deuteronomy as many have combined to represent. Indeed it is difficult to see how it altered anything in this respect. Of all forms of law, customary law is perhaps that which demands and receives most unswerving obedience. Under it, therefore, the pressure of law was heavier than it could be in any other form. It does not appear how the fact that those observing it did not think of that which they obeyed as law, but simply custom, altered the essential nature of their relation to it. They were guided by ordinances which did not express their own inward conviction, and were not a product of their own thought. They obeyed ordinances from without, and these ought therefore to have had the same effect upon the moral and spiritual life as written laws. For they cannot be said to have regulated only civil life. Religious life (even if the Book of the Covenant be Mosaic or sub-Mosaic, as I believe; much more if it be post-Davidic, as many say) must have been largely regulated by the customs of Israel. If law then be in its own nature, as the antinomians tell us, destructive of spontaneity and progress, if it necessarily externalises religion, then there would have been as little room for the religion of the prophets before Deuteronomy as after it.