Pope Pius XII
Mystici Corporis Christi §95
Mystici Corporis Christi: On the Mystical Body of Christ
95 In order to guard against the gradual weakening of that sincere love which requires us to see our Savior in the Church and in its members, it is most fitting that we should look to Jesus Himself as a perfect model of love for the Church.
Source: Mystici Corporis Christi (Vatican.va)