Fr. John A. Hardon writes lucidly on Eucharistic Adoration
"The phenomenal growth of devotion to the Real Presence of Christ in the Holy Eucharist has puzzled not a few sincere people. Nocturnal Adoration societies, Perpetual Adoration groups, national associations of the faithful promoting organized visits to the Blessed Sacrament, Holy Hours before the tabernacle, monthly, weekly and even daily exposition of the Eucharist in churches and chapels, in one country after another, have become commonplace.
"What to make of all of this? Is this another form of pious eccentricity, or is it founded on authentic Catholic doctrine and grounded on the solid rock of Christian revelation?"