A reminder about the fruitfulness of the Eucharist, even when only one person is present:
19. Even though it is on occasion not possible to have the presence and active participation of the faithful, which manifest more clearly the ecclesial nature of the celebration,[Sacrosanctum Concilium 41] the celebration of the Eucharist is always endowed with its own efficacy and dignity, since it is the act of Christ and of the Church, in which the Priest fulfills his own principal function and always acts for the sake of the people’s salvation.
Hence the Priest is recommended to celebrate the Eucharistic Sacrifice, in so far as he can, even daily.[Presbyterorum Ordinis 13; Code of Canon Law, can. 904]