The vine is an appropriate symbol of the intimate union of the believer and Christ, and the olive tree of a life fruitful in good deeds, or of the church, in whose sheltering arms all souls may find rest, as the fowls of the air in the boughs of a tree. Flowers and fruits may be the emblems of future beatitude; and a loaf, of the bread of life or of the holy eucharist. The fountain is a type of the living waters, and the lyre, of the influence of the Divine Orpheus. The lamp and the light-house are the emblems of spiritual illumination through the gospel. The balance may refer to the just dealing of the deceased, or perhaps to the final judgment and the Eastern notion of psychostasy.[385] The house probably indicates the tabernacle of the body, or perhaps the last long home of the grave, or the house not made with hands on high. Most of the symbols, however, refer to the person and work of Christ, as the central and dominating idea of the 243 church of the Catacombs. Some of these are of such importance and of so frequent occurrence as to demand a more detailed examination. One of the most striking and beautiful of these symbols is that which represents Christ as the Good Shepherd, and believers as the sheep of his fold. While the doves, as we have seen, may be regarded as emblematic of the beatified spirits of the departed, the sheep more appropriately symbolize those who, still in the flesh, go in and out and find pasture. Suggesting the thought of that sweet Hebrew idyl[386] of which the world will never grow tired; which, lisped by the pallid lips of the dying throughout the ages, has strengthened their hearts as they entered the dark valley; and to which Our Lord lent a deeper pathos by the tender parable of the lost sheep--small wonder that it was a favourite type of that unwearying love that sought the erring and the outcast and brought them to his fold again. With reiterated and manifold treatment the tender story is repeated over and over again, making the gloomy crypts bright with scenes of idyllic beauty, and hallowed with sacred associations. This symbol very happily sets forth the entire scope of Christian doctrine. It illustrates the sweet pastoral representations of man’s relationship to the Shepherd of Israel who leadeth Joseph like a flock,[387] and his individual dependence upon him who is the Shepherd and Bishop of all souls.[388] But it especially illustrates the character and office of Our Lord, and the many passages of Scripture in which he represents himself as the Good Shepherd, who forsook his eternal throne to seek through this wilderness-world the lost and wandering sheep, to save whom he gave his life that he might bring 244 them to the evergreen pastures of heaven.