31 We wish to take up this invitation and to repeat it in this encyclical, for We consider it timely and urgent and relevant to the needs of the Church in our day. With a richer understanding of the Mystical Body, we will be enabled to appreciate its theological significance and find in it a great source of spiritual strength. In this way we will notably increase our application to the task of fulfilling our own mission of serving mankind. In view of the vast literature on the subject of the Church and the fact that it is the principal topic engaging the attention of the Second Ecumenical Vatican Council, there should be no difficulty about this.
Source: Ecclesiam Suam (Vatican.va)