In a letter Tuesday to the Missionaries of the Sacred Heart of Jesus, Pope Francis reflected on the role of their foundress, St. Frances Cabrini, explaining how her example is a fitting guide for the challenges of migration we face today.

"The centennial of the death of Saint Frances Xavier Cabrini is one of the main events marking the journey of the Church," the Pope said Sept. 19. "Both because of the greatness of the figure commemorated and because of the contemporary nature of her charism and message, not just for the ecclesial community but for society as a whole."

With the "inevitable tensions" caused by the high levels of migration around the world today, Mother Cabrini becomes a contemporary figure, he continued.

Pointing to her example, he said "the great migrations underway today need guidance filled with love and intelligence similar to what characterizes the Cabrinian charism. In this way the meeting of peoples will enrich all and generate union and dialogue, not separation and hostility."

The Pope's words on Mother Cabrini and immigration were sent to participants in the General Assembly of the Institute of the Missionaries of the Sacred Heart of Jesus.

They are meeting in Chicago Sept. 17-23, marking the 100th anniversary of the death of their foundress, St. Frances Xavier Cabrini, the patron saint of immigrants.

An Italian missionary, Mother Cabrini died on Dec. 22, 1917 after spending much of her life working with Italian immigrants in the United States.

She spent nearly 30 years traveling back and forth across the Atlantic Ocean as well as around the United States setting up orphanages, hospitals, convents, and schools for the often marginalized Italian immigrants. Her feast is celebrated Nov. 13.

We must not forget, Pope Francis noted, St. Cabrini's missionary sensitivity, which was not "sectorial, but universal."

"That is the vocation of every Christian and of every community of the disciples of Jesus," he said.

Mother Cabrini's charism gave her the strength to devote herself to Italian immigrants, particularly orphans and miners, the Pope stated, and always in cooperation with the local authorities.

She helped them to fully integrate with the culture of their new countries, accompanying the Italian immigrants in becoming "fully Italian and fully American." At the same time she worked to preserve and revive within them the Christian tradition of their country of origin, Francis pointed out.

"The human and Christian vitality of the immigrants thus became a gift to the churches and to the peoples who welcomed them."

In addition to all of this, she accepted the call from God to be a missionary at a time when it would have been considered unusual for women to be sent all over the world to do missionary work with their own charism as consecrated women religious.

But her "clearly feminine, missionary consecration" came from her "total and loving union with the Heart of Christ whose compassion surpasses all limits."

St. Frances Cabrini's love for the Heart of Christ gave her the evangelical fervor and strength to care for those on the edges of society, Francis said.

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"She lived and instilled in her sisters the impelling desire of reparation for the ills of the world and to overcome separation from Christ, an impetus that sustained the missionary in tasks beyond human strength."

This year's centennial celebration gives us the opportunity to look at Mother Cabrini and the charism of the Institute of the Missionaries of the Sacred Heart of Jesus with "intimate and joyful gratitude to God," the Pope continued.

"This is a great gift above all for you, the spiritual daughters of Mother Cabrini," he concluded. "May your whole Institute, every community and every religious receive an abundant effusion of the Holy Spirit that revitalizes faith and the following of Jesus in accordance with the missionary charism of your Foundress.