But the religious instruction was not to be limited to the reiteration of these great sentences; in that case they would have become a mere form of words. In the last verses of the chapter, vv. 20-25, we find a model of the kind of explanatory comment which was to be given in addition: "When thy son asketh thee in time to come, saying, What mean the testimonies, and the statutes, and the judgments, which Yahweh our God hath commanded you? then thou shalt say unto thy son, We were Pharaoh's bondmen in the land of Egypt; and Yahweh brought us out of Egypt with a mighty hand," and so on. That means that the _history_ of Yahweh's dealings with His people was to be taught, to show the reasonableness of the Divine commands, to exhibit the love-compelling character of God. And this was entirely in accord with the Biblical conception of God. Neither here nor elsewhere in the Old Testament are there any abstract definitions of His character, His spirituality, His omnipresence, or His omnipotence. Nor is there anywhere any argument to prove His existence. All that is postulated, presupposed, as that which all men believe, except those who have wilfully perverted themselves. But the existence of God with all these great and necessary attributes is undoubtedly implied in what is narrated of Yahweh's dealings with His people. As we have seen, too, the very name of Yahweh implies that His nature should not be limited by any definition. He was what He would prove Himself to be, and throughout the Old Testament the _gesta Dei_ through and for the Israelites, and the prophetic promises made in Yahweh's name, represented all that was known of God. This gave a peculiarly healthy and robust tone to Old Testament piety. The subjective, introspective element which in modern times is so apt to take the upper hand, was kept in due subordination by making history the main nourishment of religious thought. In constant contact with external fact, Israelite piety was simple, sincere, and practical; and men's thoughts being turned away from themselves to the Divine action in the world, they were less touched by the disease of self-consciousness than modern believers in God. In every sphere of human life, too, they looked for God, and traced the working of His hand. The later distinction between the sacred and secular parts of life, which has been often pushed to disastrous extremes, was to them unknown. For these among many other reasons, the Old Testament must always remain of vital importance to the Church of God. It can fall into neglect only when the religious life is becoming unhealthy and one-sided.