Missa defunctorum, or in English Mass of the Dead. (a.k.a. Requiem). In the old days, when someone died, family, friends and acquaintances of the deceased prayed for the repose of the person's soul. It was "look forward" not a look backward as are present day practices.
Also on these boards
"Without Me, you can do nothing." Actually, Adele inadvertently alludes to why I go to Eucharistic Adoration: I have insecurities, and the Lord points them out to me. But He also provides a safe place in which we can confront them together-- so I can offer them up to Him for healing. In the words "Jesus, I trust in You" is His implicit question "do you believe that I can do this for you?"