That parallelism of the two crossings is suggested by the notice of date in verse 19. 'The tenth day of the first month' was just forty years to a day since the first Paschal lamb had been chosen, and four days short of the Passover, which was solemnised at Gilgal (Joshua v. 10) where they encamped that night. It was a short march from the point of crossing, and a still shorter from Jericho. It would have been easy to fall upon the invaders as they straggled across the river, but no attempt was made to dispute the passage, though, no doubt, many a keen pair of eyes watched it from the neighbouring hills. In the beginning of the next chapter we are told why there was this singular supineness. 'Their heart melted, neither was there spirit in them any more,' or, in more modern language, panic laid hold of the enemy, and they could not pluck up courage to oppose the advance of Israel. If we add this result to those mentioned in chapter in., we find sufficient motive for the miracle to take it out of the class of purposeless, legendary wonders. Given the importance of Israel as the depositaries of revelation, there is nothing unreasonable in a miracle which so powerfully contributed to their conquest of Canaan, and we have yet to learn that there is anything unreasonable in the belief that they were the depositaries of revelation. The fundamental postulate of the Old Testament is a supernatural revelation, and that opens the door for any miracle needful for its accomplishment. It is folly to seek to conciliate by minimising the miraculous element. However much may be thrown out to the wolves, they will not cease to pursue and show their teeth. We should be very slow to pronounce on what is worthy of God; but any man who believes in a divine revelation, given to the world through Israel, may well believe in such a miracle as this at such a moment of their history.
III. The memorial stones (verses 20-24). Gilgal, the first encampment, lay defenceless in the open plain, and the first thing to be done would be to throw up some earthwork round the camp. It seems to have been the resting-place of the ark and probably of the non-combatants, during the conquest, and to have derived thence a sacredness which long clung to it, and finally led, singularly enough, to its becoming a centre of idolatrous worship. The rude circle of unhewn stones without inscription was, no doubt, exactly like the many prehistoric monuments found all over the world, which forgotten races have raised to keep in everlasting remembrance forgotten fights and heroes. It was a comparatively small thing; for each stone was but a load for one man, and it would seem mean enough by the side of Stonehenge or Carnac, just as Israel's history is on a small scale, as compared with the world-embracing empires of old. Size is not greatness; and Joshua's little circle told a more wonderful story than its taller kindred, or Egyptian obelisks or colossi.
These grey stones preached at once the duty of remembering, and the danger of forgetting, the past mercies of God. When they were reared, they would seem needless; but the deepest impressions get filled up by degrees, as the river of time deposits its sands on them. We do not forget pain so quickly as joy, and most men have a longer and keener remembrance of their injurers than of their benefactors, human or divine. The stones were set up because Israel remembered, but also lest Israel should forget. We often think of the Jews as monsters of ingratitude; but we should more truly learn the lesson of their history, if we regarded them as fair, average men, and asked ourselves whether our recollection of God's goodness to us is much more vivid than theirs. Unless we make distinct and frequent efforts to recall, we shall certainly forget 'all His benefits.' The cultivation of thankful remembrance is a very large part of practical religion; and it is not by accident that the Psalmist puts it in the middle, between hope and obedience, when he says 'that they might set their hope in God, and not forget the works of God, but keep His commandments' (Psalm lxxviii.7).