First, God's soldiers must be pure. The conditions of God's help are the same to-day as when that panic-stricken crowd ignominiously fled down the rocky pass, foiled before an insignificant fortress, because sin clave to them, and God was gone from them. The age of miracles may have ceased, but the law of the divine intervention which governed the miracles has not ceased. It is true to-day, and will always be true, that the victories of the Church are won by its holiness far more than by any gifts or powers of mind, culture, wealth, eloquence, or the like. Its conquests are the conquests of an indwelling God, and He cannot share His temples with idols. When God is with us, Jericho is not too strong to be captured; when He is driven from us by our own sin, Ai is not too weak to defeat us. A shattered wall keeps us out, if we fight in our own strength. Fortifications that reach to heaven fall flat before us when God is at our side. If Christian effort seems ever fruitless, the first thing to do is to look for the 'Babylonish garment' and the glittering shekels hidden in our tents. Nine times out of ten we shall find the cause in our own spiritual deficiencies. Our success depends on God's presence, and God's presence depends on our keeping His dwelling-place holy. When the Church is 'fair as the moon,' reflecting in silvery whiteness the ardours of the sun which gives her all her light, and without such spots as dim the moon's brightness, she will be 'terrible as an army with banners.' This page of Old Testament history has a living application to the many efforts and few victories of the churches of to-day, which seem scarce able to hold their own amid the natural increase of population in so-called Christian lands, and are so often apparently repulsed when they go up to attack the outlying heathenism. 'His strength was as the strength of ten, Because his heart was pure,' is true of the Christian soldier.