For 2000 years, Catholics have believed Jesus to be truly present in the most Holy Eucharist, just as He taught His disciples in John 6. We believe that at each celebration of the Mass, bread and wine are truly transformed into the Body and Blood of Jesus Christ. Therefore, Jesus comes to be present with us not only spiritually, but physically. In the Eucharist, Jesus is just as present with us in the disguise of bread and wine as He was in the disguise of a man 2000 years ago when He walked the earth.
Therefore, if Jesus is truly present (body, blood, soul, & divinity) in the most Holy Eucharist, then we can gaze upon Jesus and worship Him in His physical presence. Therefore, we are blessed with the awesome opportunity to worship Jesus through Adoration of the Blessed Sacrament, or most Holy Eucharist. In Eucharistic Adoration, the Eucharistic Host (the Body of Jesus) is placed in a gold monstrance to be adored.