Ecclesiam Suam §29

²⁹ It is a fact, moreover, that in recent years the Church has actually embarked on a deeper study of itself. Outstanding theologians have made an excellent contribution to this work. So have great scholars and intellectuals, the foremost theological schools, and pastoral and missionary societies. Successful experiments have been conducted in the religious field, and we have, above all, the memorable doctrinal statements issued by the popes.