Back in Catalonia, the chapter vicar of the diocese of Vic, Luciano Casadevall, sends him to the parish of Viladrau. There, in absence of doctors and thanks to his knowledge of the curative power of plants in the Montseny Mountains rightly serves the sick and acquires fame as a healer. As his missionary concern was still alive, on August 15, 1840 he decides to carry out his first popular mission. As the parish is well assisted, he can go out to preach missions in nearby villages. His superior, aware of his apostolic vocation and the fruits of his preaching, frees him from a parish service and lets him engage in missions. From January 1841 he moves to Vic and is fully dedicated to go across different villages of the diocese. For the sake of communion with the hierarchy and the pastoral faculties involved, he asks Propaganda Fide for the title of “Apostolic Missionary” which he fills with spiritual and apostolic content.
He walks across much of Catalonia between 1843 and 1848, preaching the Word of God, always on foot, not collecting money or gifts for his ministry. It moves him to imitate Jesus Christ and the apostles. Despite his political neutrality, he will soon suffer persecution and slander from those who accuse him of favouring the more conservative parties. In each location he preaches missions to the people and conducts retreats for priests and religious. He soon discovers that also other means of apostolate may help him ensure the effectiveness and continuity of the fruits of the missions: public prayer books, catechisms and prints aimed at priests, nuns, children, youth, married, parents, etc.; in 1848 he founds the Religious Library, a publishing house which in its first eighteen years launches 2,811,100 copies of books, 2,509,500 of small books and 4,249,200 leaflets.
As effective means of perseverance and progress in the Christian life he founds or promotes religious brotherhoods, including the Confraternity of the Immaculate Heart of Mary, and writes the book “Daughters of the Blessed and Immaculate Heart of Mary”, which eventually will inspire the birth of the secular institute of Cordimarian affiliation.
Unable to continue preaching in Catalonia because of the outbreak of the Second Carlist War, his superior sends him to the Canary Islands. From February 1848 to May of the following year, he covers most of the island of Gran Canaria and two locations of Lanzarote Island. Colloquially he is soon started being called “the Padrito”. He became so popular that he is is co-patron of the diocese of Las Palmas along with the Virgen del Pino.