Adoration, as per Bishop Sheen, is NOT a devotion… like the rosary, a novena, stations of the cross etc.
Catholics believe you cannot worship God fully if you do not adore Him. In the Garden, He asked, “…can you not spend one hour with me…”?
Picture this:
At the consecration, the priest holds up the host for a short period, while all adore the Real Presence. He could hold it up for minutes or longer…but the reality of our lives says he must continue the Mass, let us go about our lives, (and clear the parking lot for the next Mass, perhaps). So the sacred host is only held up for us to see and adore for a very short time.
Think of Adoration, where the sacred host in held in the Monstrance for all to adore… you can spend far more than that very short time not only worshiping, but also adoring.
Most adorers will spend an hour ("…will you not…"), while many will spend many hours. Bishop Sheen spent at least one hour every day for over fifty years, in adoration. He also encouraged every single priest to do the same… spend that special time with the Lord, leave all your troubles with the Lord, gain the peace and holiness of His presence…
as a side note… during the war (2nd, I believe), the communists destroyed a Catholic Church and scattered the hosts on the floor after breaking into the tabernacle. A little girl, hiding in the desecrated church saw this.
Each day, she would sneak into the ruined building, go to the sanctuary, kneel and receive one host with her tongue.
On the day she consumed the last host, the communist soldiers caught her and killed her. But she had served her Lord to the end. It was this story that prompted Bishop Sheed to begin his adoration.