[96] and cisterns prepared before-hand intimate the rewards which fall to the lot of some for their labour, while they are given spontaneously to others, being channels of heavenly and wholesome waters and well prepared treasures for the preservation of the virtues before mentioned, by means of which joy is shed over the perfect heart, irradiating it all over with the light of truth. Again, when Moses speaks of the vineyards, he means them as an emblem of cheerfulness, and the olive gardens as a symbol of light.