It seems like you don’t know what the Mass is. It is a time of Christian fellowship, but that’s not
all it is.
At Mass, God (Jesus) comes down from Heaven on to the Altar, and then gives Himself to us, Body and Blood, Soul and Divinity, in Holy Communion. When we fall on to our knees at the moment of the Consecration, it is in recognition of the fact that Jesus is among us in more than just a spiritual way. (Which, as you point out, Jesus can certainly be with us in a spiritual way at any time - but at Mass, His presence is much
more than just spiritual. It is still less than His fully corporeal human form, of course, since He is hidden under the appearances of bread and wine, but it is a
greater closeness to Him than we can find in any
other situation.
This is brilliant - this is
it, in a nutshell.
This is actually one of the most common descriptions of the Mass given by the great teachers of our faith, from the Early Fathers (the first followers of the Apostles) on down to modern times.
To be present at Mass is to be present in an unbloody manner at Calvary, when Jesus gave Himself to us on the Cross, and it is also to be present in Heaven in perfect union with the living Lamb of God.
We have a story that we tell to children, to illustrate this point. I’m going from memory, and I’m trying to make it short, but once upon a time, there was a great mother bird - if I recall correctly, she was a Canada goose - and her eggs were lost in a terrible storm. Instead of grieving for her eggs, she decided to go to all the other nests in the region where the storm had hit, and save as many eggs as she could, since many other of the mother birds had been killed or gotten lost in the storm.
She found three eggs alive, and took them to her nest. When they hatched, she found that one was a duck, one was an eagle, and one was a pigeon. She fed them every day until they were big enough to peck for their own food. Then, she realized that she still needed to grieve for her eggs that were lost, so she left the three hatchlings, and told them, “I will return for you when the cold winds come, and it is time to fly south. While I am gone, take care of each other, and learn how to fly. You must practice flying every day. Then, we will go to the great land of the South, where it will be warm and sunny, with lots of good food to eat. Remember that I love you, and that I will return for you.”
At first, all three hatchlings were afraid. But the eagle said, “She has told us that we must learn to fly, so this, we must do.” The duck said, “I am afraid.” The pigeon said, “I don’t understand why we have to do this.” To make a long story short, the eagle was first to learn to fly. The duck was afraid, but with the eagle’s help, he kept trying, and although he could not soar like the eagle, he soon found that he could go quite long distances without tiring. But the pigeon thought the whole thing was a waste of time, and refused to learn, saying, “The mother will return for us and take us to the land of the South where everything is wonderful, so why should I need to learn how to fly? I will just wait for her to come and get me.”
The day came, and the Mother returned. She said to them, “So, did you learn to fly?” The eagle and the duck proudly showed her their skills, but the pigeon said, “I did not. I thought it was a waste of time. When are we going to the land of the South?”
The Mother looked sadly at the pigeon. “Did you not understand? We have to
fly to the land of the South - and we must do so quickly, because the cold winds are already blowing, and we will freeze to death if we don’t start today!”
So the Mother, together with the eagle and the duck, soared into the air, wheeled around, shouted “Goodbye!” to the pigeon, and followed the sun in a southward direction.
The pigeon wept bitter tears of rage and disappointment. A few days later when the cold came, a stray dog found his dead, frozen body, and ate him.