Private prayer, though essential to the spiritual life, can never replace the celebration of the Eucharistic Liturgy and the reception of Holy Communion.You cannot pray at home as at church, where there is a great multitude, where exclamations are cried out to God as from one great heart, and where there is something more: the union of minds, the accord of souls, the bond of charity, the prayers of the priests. (De incomprehensibili 3, 6: PG 48, 725)