In the Lord's Supper, there are a number of hidden mysteries.
One of them is hidden in the bread. Please allow me to leapfrog the obvious. We are, all of us, the grains of wheat that become the bread. This is why they call this meal, "communion." In it the bread shadows the church - a single, nourishing whole made from many.
1 Cor 10:16
The cup of blessing which we bless, is it not the communion of the blood of Christ? The bread which we break, is it not the communion of the body of Christ?
And the bread explicitly shadows the body of Christ.
1 Cor 11:24
And when he had given thanks, he brake it, and said, Take, eat: this is my body, which is broken for you: this do in remembrance of me.
The bread that we share together should be whole at the start of the Supper, and it should be broken as it is passed around. We must tear His body to be healed in our own. The tearing of the bread is a moment of deep reflection, because there is no healing, no salvation, no hope for us if His body is not broken and torn for us 2000 years ago. It is no use being like Peter and forbidding the Lord to die. We must embrace His sacrifice and can offer only the sacrifice of thanksgiving to Him.
1) We declare His death until He comes
2) We embrace the breaking of His body for us.