73 To those of you who suffer patiently in the cause of truth and justice, We speak the consoling words which St. Leo once addressed to the clergy, public officials and people of Constantinople: "Be steadfast, therefore, in the spirit of Catholic truth, and receive apostolic exhortation through Our ministry. 'For unto you it is given for Christ, not only to believe in him, but also to suffer for him' ( Phil . 1:29)." (65)
Source: Aeterna Dei Sapientia (Vatican.va)