When Bergoglio was a Cardinal, his views about the celibacy of priests were recorded in the book "On Heaven and Earth." The book is a record of conversations he had with a Buenos Aires rabbi. In this book, he said that celibacy "is a matter of discipline, not of faith. It can change." However, he added: "For the moment, I am in favor of maintaining celibacy, with all its [positive and negative parts], because we have ten centuries of good experiences rather than failures [...] Tradition has weight and validity."