Although we don’t know very much about the life of Juan Diego before his conversion, we know that he was born in the year 1474 in part of what is today Mexico City. The Catholic faith was brought to Mexico in 1519 when Cortez landed on the coast of Mexico, and there were Catholic priests with him. Juan Diego was among the first of those the hear the Gospel, and in 1524, when he was 50 years old, Juan Diego was baptized by a Franciscan priest, Fr. Peter da Gand.
Juan Diego took his faith very seriously and attended Mass on a daily basis. He had a fifteen mile walk to Mass every morning, and on December 9, 1531, when Juan Diego was on his way to morning Mass, the Blessed Mother appeared to him on Tepeyac Hill, the outskirts of what is now Mexico City. She asked him to go to the Bishop and to request that the bishop build a shrine be built at Tepeyac, where she promised to pour out her grace upon those who asked for her prayers. The Bishop at first didn’t believe Juan Diego, and he asked for some sign to prove that the apparition was true. On December 12, Juan Diego returned to Tepeyac. The Blessed Mother told him to climb the hill and to pick the flowers that he would find in bloom. He obeyed, and even though it was winter time, he found roses blooming. He gathered the flowers and took them to Our Lady who carefully placed them in his mantle and told him to take them to the Bishop as "proof". When he opened his mantle, the flowers fell on the ground and there remained impressed, in place of the flowers, an image of the Blessed Mother, the apparition at Tepeyac.
With the Bishop's permission, Juan Diego lived the rest of his life as a hermit in a small hut near the chapel where the miraculous image was placed for veneration. Here he cared for the church and the first pilgrims who came to ask for Mary’s intercession.
Not only had Juan Diego been chosen as Our Lady's messenger, but he also received grace which helped him to have great spiritual growth, and from that moment, he began a life dedicated to prayer and the practice of virtue and boundless love of God and neighbour. He died in 1548 and was buried in the first chapel dedicated to the Virgin of Guadalupe.
O God, who in the blessed Virgin Mary didst consecrate a dwelling place meet for thy Son: We humbly pray that we, observing the appearing of the same blessed Virgin, may obtain thy healing both in body and soul; through the same thy Son Jesus Christ our Lord, who liveth and reigneth with thee and the Holy Spirit, one God, for ever and ever. Amen.