" Whereas the angel “came” to Mary (Lk 1:28), he merely appears to Joseph in a dream—admittedly a dream that is real and reveals what is real. Once again this shows us an essential quality of the figure of Saint Joseph: his capacity to perceive the divine and his ability to discern. Only a man who is inwardly watchful for the divine, only someone with a real sensitivity for God and his ways, can receive God’s message in this way. "
― Benedict XVI , Jesus of Nazareth: The Infancy Narratives