On Aug. 21, the Catholic Church celebrates the feast day of Pope Saint Pius X, known for opposing doctrinal errors, promoting frequent Holy Communion, and initiating liturgical reforms during the early 20th century.

“He loved Christ and fed His flock,” Pope Pius XII said of his predecessor St. Pius X, in a May 1954 message delivered shortly after his canonization. “He drew abundantly on the heavenly treasures which our merciful Redeemer brought to the earth, and distributed them bountifully to the flock.”

In that statement, Pope Pius XII praised St. Pius X for giving the Church “the nourishment of truth,” and for showing “charity, earnestness in governing, fortitude in defense. He gave fully of himself and of those things which the Author and Giver of all good things had bestowed on him.”

Giuseppe Melchiorre Sarto was born June 2, 1835 in the Italian town of Riese near Venice. He was the oldest of eight children born to Giovanni Sarto, a postman, and his wife Margherita, a seamstress. His humble family background gave the future Pope a lifelong appreciation of poverty and simplicity.

A local priest instructed Giuseppe in Latin, and a scholarship enabled him to attend high school in a nearby town. His parents encouraged their son’s discernment of a vocation to the priesthood, and he received a second scholarship to enter the seminary in Padua during 1850.

Ordained in 1858, Father Sarto served as a parish priest in a poor area of the Trentino district, assisting a pastor who observed his pastoral gifts and predicted his rise within the Church. In 1867 he became a pastor in the Treviso diocese, where he was known for his charity and sound teaching.

Nine years later he became chancellor of the diocese, canon of its cathedral, and rector of its seminary. Alongside these responsibilities, he devoted time to instructing children in their faith, giving special attention to public school pupils who received no religious formation in the classroom.

In 1884, Pope Leo XIII appointed Canon Sarto as Bishop of Mantua. As a bishop, he worked to reform the troubled diocese, urging its priests to embrace their responsibility to communicate the truths of the faith. He continued to lead by example, personally undertaking the work of religious instruction.

Made a cardinal and named Patriarch of Venice in 1893, he demonstrated his customary care for the poor and attention to the teaching of the faith. But Cardinal Sarto had no expectation of becoming Pope after Leo XIII died in 1903, nor did he want to assume the responsibility.

Against his own wishes, however, he was chosen as Leo’s successor, taking the name of Pius X. His motto, “To restore all things in Christ,” was implemented with a focus on priestly formation, instruction of laypersons, the revival of traditional sacred music, and the Church’s liturgical and sacramental life.

During his pontificate, Pius X took steps to combat the heresy he termed “modernism,” characterized by the idea that religious truths were ultimately unknowable and subject to change throughout history. Modernism received its strongest condemnation in his 1907 encyclical “Pascendi Dominici Gregis.”

While his reforming efforts bore fruit among the faithful, Pope Pius X was distraught over his inability to prevent the coming World War, which he is said to have predicted as a catastrophe for civilization and the Church. He died on Aug. 20, 1914, only weeks after the war began.

Beatified in 1951, St. Pius X was canonized in 1954. He was the first Pope to be declared a saint since the 1712 canonization of the 16th century Pope St. Pius