167 We should imitate the virtues of the saints just as they imitated Christ, for in their virtues there shines forth under different aspects the splendor of Jesus Christ. Among some of these saints the zeal of the apostolate stood out, in others courage prevailed even to the shedding of blood, constant vigilance marked others out as they kept watch for the divine Redeemer, while in others the virginal purity of soul was resplendent and their modesty revealed the beauty of Christian humility; there burned in all of them the fire of charity towards God and their neighbor. The sacred liturgy puts all these gems of sanctity before us so that we may consider them for our salvation, and "rejoicing at their merits, we may be inflamed by their example." It is necessary, then, to practice "in simplicity innocence, in charity concord, in humility modesty, diligence in government, readiness in helping those who labor, mercy in serving the poor, in defending truth, constancy, in the strict maintenance of discipline justice, so that nothing may be wanting in us of the virtues which have been proposed for our imitation. These are the footprints left by the saints in their journey homeward, that guided by them we might follow them into glory." In order that we may be helped by our senses, also, the Church wishes that images of the saints be displayed in our churches, always, however, with the same intention "that we imitate the virtues of those whose images we venerate."
Source: Mediator Dei (Vatican.va)