Philo Judaeus De Fuga Et Inventione 176

[176] You see here the ungrudging abundance of all the great blessings which are ready, and poured forth for man’s possession and enjoyment. And the generic virtues are here likened to cities, because they are of the most comprehensive kind; and the specific virtues are likened to houses, because they are contracted into a narrower circle; and the souls of a good disposition are likened to cisterns, which are well inclined to receive wisdom, as the cisterns are calculated to receive water; and the improvement, and growth, and production of fruit, are compared to vineyards and olive gardens; and the fruit of knowledge is a life of contemplation, which produces unmixed joy, equal to that which proceeds from wine; and a light appreciable only by the intellect, as if from a flame of which oil is the nourishment.