Exposition of the Blessed SacramentThe priest or deacon takes the consecrated host out of the tabernacle and places it in the monstrance (which has already been placed on the altar) while the faithful sing O Salutaris Hostia. The faithful kneel at the moment of exposition.
Opening PrayerWhen there is an extended adoration over the course of the day or days, an opening prayer suitable for the occasion collecting and offering the praise and the prayers of the faithful may be offered by the priest or deacon.
AdorationAdoration of the Blessed Sacrament is almost always done in silence. Where readings, songs, psalms, devotional prayers (such as the rosary, litany or a novena prayer) or a homily are incorporated, there are still usually lengthy periods of sacred silence for the faithful to be present to Christ in the Eucharist without distraction. Solemn Vespers or Evensong is often sung in the presence of the Blessed Sacrament.
CensingBringing adoration to a close and in preparation for the benediction while all kneel, the priest or deacon censes the exposed host while the faithful sing the Tantum Ergo. This is followed by a versicle and response:
V/ Panem de Caelo praestitisti eis.
R/ Omne delectamentum in se habentem.
V/ Thou gavest [or You gave] them bread from heaven.
R/ Containing within itself all sweetness.