Analysis of information sources in references of the Wikipedia article "Pope John Paul I" in English language version.
So strongly did the writings of Couwase [Jean Pierre de Caussade] influence him that Luciani began to think very seriously of becoming a Jesuit. He watched as the first one, then a second, of his close friends went to the rector, Bishop Giouse Cattarossi, and asked for permission to join the Jesuit order. In both instances, permission was granted to them. Luciani would soon decide, so he went and asked for permission. The bishop considered the request, then responded, "No, three is one too many. You had better stay here.