The Gioventù Studentesca (GS) of Luigi Giussani was a shock within the Church in the fifties and sixties. Comunione e Liberazione was a shock within civil society at the turn of the sixties and seventies. But which instances did C.L. bring when it was founded? What was lost on the way, but first of all what was not perceived and what can still challenge us? We asked it to the main figures inside and outside the movement during its birth, all equally involved in that period of our history: who participated in founding it, who lived it as a Christian from outside, who met it as an agnostic, who has freely used these instances for other paths.