His years as a Marist, including service as a provincial leader, saw the deepening of his Eucharistic devotion, especially through his preaching of Forty Hours in many parishes.
The Congregation of the Blessed Sacrament began working with children in Paris to prepare them to receive their first Holy Communion. It also reached out to non-practicing Catholics, inviting them to repent and begin receiving Holy Communion again. He was a tireless proponent of frequent Holy Communion, an idea given more authoritative backing by Pope Pius X in 1905.
Inspired at first by the idea of reparation for indifference to the Eucharist, St. Peter Julian was eventually attracted to a more positive spirituality of Christ-centered love. Members of the men's community, which Peter founded, alternated between an active apostolic life and contemplating Jesus in the Eucharist. He and Marguerite Guillot founded the women's Congregation of the Servants of the Blessed Sacrament.
Peter Julian Eymard was beatified in 1925 and canonized in 1962, one day after the first session of the Second Vatican Council ended.
O God, who didst adorn St. Peter Julian Eymard with a wondrous love for the sacred mysteries of the Body and Blood of thy divine Son; grant that we may be worthy to receive the same devotion he drew from this holy banquet; through the same Jesus Christ thy Son our Lord, who liveth and reigneth with thee, in the unity of the Holy Ghost ever, one God, world without end. Amen.