Texts of the meeting held in the Biblioteca Ambrosiana in Milan on the theme of solidarity. Two different and complementary views: the church, headed by Cardinal Carlo Maria Martini, and the sociopolitical by Professor Massimo Cacciari, a philosopher and professor of aesthetics at the University of Venice, a city which is also mayor. Thoughts and notes stimulants on a rising, solidarity in times of indifference, loneliness and disappointment.