The following is adapted from a homily preached by Fr. de Souza at a Mass for the 10th anniversary of his ordination, on July 20, 2012.

KRAKOW, POLAND - In this historic chapel of the residence of the archbishops of Krakow, Cardinal Stanislaus Dziwisz has now fashioned a fitting shrine to its most famous resident, Cardinal Karol Wojtyla.

The new reredos imaginatively includes the churches linked to the life of Blessed John Paul II — his baptismal church in Wadowice; the sanctuary of the Queen of Poland at Czestochowa; the Mariacki church of Krakow’s heart; Our Lady of Fatima, the protectress of the pope’s life; the Holy Sepulchre of Jerusalem, the destination of his epic Jubilee pilgrimage; Wawel, his seat as successor of St. Stanislaus; the Vatican basilica, his Roman home as the successor of St. Peter; and the shrine of Divine Mercy, the mystery of which, as Cardinal Ratzinger said in his funeral homily, was the key to John Paul’s entire teaching, and the shrine of which the late pope consecrated on his farewell visit to this, his beloved Krakow, in 2002.

That was 10 years ago next month. A few weeks before he returned to Krakow to consecrate the shrine of Divine Mercy, Blessed John Paul II was in Canada for Toronto’s World Youth Day. As part of those events, I was ordained a priest of Jesus Christ in Kingston, 10 years ago today. And a few weeks before that I came to Krakow to rejoin for a few days the seminar which first brought me to this city in 1994. During those days I came to pray in this chapel, the very chapel where Karol Wojtyla was ordained a priest on All Saints Day 1946.

I prayed then for the gift of the priesthood that awaited me; I return today to give thanks to the mercy of God for 10 years of priestly life. I return with my own parents, who made of our home a domestic church where the One greater than the temple found a place to dwell. After God Himself, to them belongs the gratitude of the Church for my priestly vocation and whatever fruit there has been from these 10 years of work in the Lord’s vineyard.

I come today also with George Weigel, and in him is represented the Krakow seminar that was for me a decisive step on the path to the priesthood. To him God gave the great mission of explaining to the world who John Paul II is, and George knew that this extraordinary Christian disciple had to be explained “from the inside” not from the “outside.” In this chapel one now sees, behind the altar, the churches of Karol Wojtyla’s life, but in the tabernacle one beholds the mystery that is the window to understanding him from the inside.

It was in this house that the young Karol Wojtyla would come to know Adam Sapieha, the prince archbishop, who, George Weigel tells us in Witness to Hope, “would be his model of Church leadership for more than half a century.” Archbishop Sapieha, made a cardinal after the war, was the great defender of the Church and the people during the long night of the occupation. He courageously opened a clandestine seminary in this residence, and the young men would often come to serve the archbishop’s Mass here.

Karol Wojtyla came, as did another young man, Jerzy Zachuta. In April 1944, Jerzy was killed by the Gestapo. Later that year, Wojtyla and the others would move into this house, it being too dangerous to live outside in their own city. For Jerzy Zachuta his vocation finished almost as soon as it started. The Lord had a different plan for Karol Wojtyla.

“For some time I thought about the possibility of becoming a Carmelite,” John Paul would write in 1996. “My uncertainties were resolved by Archbishop Cardinal Sapieha, who — in his usual manner — said briefly: ‘You should first of all finish what you started.’ And that is what I did.”

It was an unusual answer, because finishing what he started meant, among other things, not becoming a Carmelite. Yet the unbroken prince archbishop spoke more providently than he knew; Karol Wojtyla would not finish what he started until he had done what the other great Polish cardinal of the 20th century, Stefan Wyszynski, prophesied, namely to lead the Church across the threshold of hope into the third Christian millennium.

Finish what you have started. The Christian life might be summed up as just that — finish well what God has begun in you at baptism. It can summarize the great Christian pilgrimage through history. What my parents have done, what I and my brother and sisters must do, is to continue what has been lived by so many generations of faithful Catholics in our family. I carry in my heart today in particular the witness of my late grandmothers; I offered my first Mass for them 10 years ago, and I offer this Mass for them today.

We do not know the finish. We walk by faith and trust in God. Yet I do know this, that the past 10 years have been a blessing beyond measure, that I cannot imagine another life that would have brought me more joy — or allowed me to have more fun! — than the great adventure of being a Catholic priest in the third millennium.

I am a Catholic priest. That declaration is a sombre one to make in Krakow, as the image of St. Maximilian Kolbe in the church across the street reminds us. The Lord has not asked of me hardship, or even difficulty. He has granted me instead a full measure, pressed down and overflowing, the hundredfold return, and as yet without persecutions. Perhaps they will come; perhaps they will not. We do not know how we will finish.

On July 20, 2002, the Most Reverend Francis John Spence, archbishop of Kingston, took my hands in his and said to me: “May God who has begun this good work in you now bring it to fulfilment.”

We might translate that into the history of this chapel: You must finish what you have started. Amen.