Salus Populi Romani

icon of Salus Populi Romani in the Santa Maria Maggiore Basilica in Rome. 

Recounted by pious tradition to have been painted by St. Luke the Evangelist.

"That God should have condescended to become a human mother's son;  that one woman whose womb was sanctified as the holy temple and tabernacle of the living God should have been permitted to walk the earth -- these wonders make up the sum total of the earth's actual purpose and they are the fulfillment of all its expectations." (pp. 25-26)

- Fr. Alfred Delp SJ, “The Prison Meditations of Father Alfred Delp”, 1963 Herder and Herder New York
See also: The Prison Meditations of Father Delp