The meeting of the great Swiss theologian with the founder of Comunione e Liberazione, with an introduction by Don Julian Carron, current guide of C.L. The book contains the transcription of the lessons given by von Balthasar and Giussani in January 1971 during a cycle of spiritual exercises for members of the Comunione e Liberazione movement of the universities of Freiburg, Bern and Zurich. The needs of the current historical moment require the Christian to have a state of evangelical life marked by activity and living commitment.