When Italy went to war in 1915 he was drafted as a sergeant in the medical corps and became a chaplain to wounded soldiers. When the war ended, he opened a “Student House” for the spiritual needs of young people.
In 1919 he was made spiritual director of the seminary, but in 1921 he was called to the service of the Holy See. Benedict XV brought him to Rome to be the Italian president of the Society for the Propagation of the Faith. In 1925 Pius XI named him Apostolic Visitator in Bulgaria, raising him to the episcopate with the titular Diocese of Areopolis. For his Episcopal motto he chose Oboedientia et Pax, which became his guiding motto for the rest of his life.
On 19 March 1925 he was ordained Bishop and left for Bulgaria. He was granted the title Apostolic Delegate and remained in Bulgaria until 1935, visiting Catholic communities and establishing relationships of respect and esteem with the other Christian communities. In the aftermath of the 1928 earthquake his solicitude was everywhere present. He endured in silence the misunderstandings and other difficulties of a ministry on the fringes of society, and thus refined his sense of trust and abandonment to Jesus crucified.
In 1935 he was named Apostolic Delegate in Turkey and Greece. The Catholic Church was present in many ways in the young Turkish republic. His ministry among the Catholics was intense, and his respectful approach and dialogue with the worlds of Orthodoxy and Islam became a feature of his tenure. When the Second World War broke out he was in Greece. He tried to get news from the prisoners of war to their families and assisted many Jews to escape by issuing “transit visas” from the Apostolic Delegation. In December 1944 Pius XII appointed him Nuncio in France.
During the last months of the war and the beginning of peace he aided prisoners of war and helped to normalize the ecclesiastical organization of France. He visited the great shrines of France and participated in popular feasts and in important religious celebrations. He was an attentive, prudent and positive observer of the new pastoral initiatives of the Bishops and clergy of France. His approach was always characterized by a striving for Gospel simplicity, even amid the most complex diplomatic questions. The sincere piety of his interior life found expression each day in prolonged periods of prayer and meditation. In 1953 he was created a Cardinal and sent to Venice as Patriarch. He was filled with joy at the prospect of ending his days in the direct care of souls, as he had always desired since becoming a priest. He was a wise and enterprising pastor, following the model pastors he had always venerated and walking in the footsteps of St Laurence Giustiniani, first Patriarch of Venice. As he advanced in years his trust in the Lord grew in the midst of energetic, enterprising and joyful pastoral labours.
At the death of Pius XII he was elected Pope on 28 October 1958, taking the name John XXIII. His pontificate, which lasted less than five years, presented him to the entire world as an authentic image of the Good Shepherd. Meek and gentle, enterprising and courageous, simple and active, he carried out the Christian duties of the corporal and spiritual works of mercy: visiting the imprisoned and the sick, welcoming those of every nation and faith, bestowing on all his exquisite fatherly care. His social magisterium in the Encyclicals Pacem in terris and Mater et Magistra was deeply appreciated.
He convoked the Roman Synod, established the Commission for the Revision of the Code of Canon Law and summoned the Second Vatican Council. He was present as Bishop in his Diocese of Rome through his visitation of the parishes, especially those in the new suburbs. The faithful saw in him a reflection of the goodness of God and called him “the good Pope”. He was sustained by a profound spirit of prayer. He launched an extensive renewal of the Church, while radiating the peace of one who always trusted in the Lord. Pope John XXIII died on the evening of 3 June 1963, in a spirit of profound trust in Jesus and of longing for his embrace.
Mater et Magistra
Pacem in Terris