When Jesus arrived with his disciples, while they were reclining at the table he said to them, “one of you will betray me.”…While they were eating Jesus took bread and broke it saying, “this is my body which is broken for you.” and taking the cup gave thanks and gave it to the disciples and they all drank from it. He said, “This is my blood of the covenant which is poured out for many.” (Mark 14:17-25 NIV)
We know that the body of Christ was broken and his blood poured out on the cross for our atonement. Isaiah 53 says He was pierced for our transgressions and crushed for our sins. The punishment that brought us peace was upon him.
In Daniel 7:13, we get a picture of Christ triumphant after his suffering and death. It is only by Christ that anyone has eternal life. Paul said in Acts 4:12 that salvation is found in no one else, there is no other name under heaven given to men whereby we must be saved. So Christ atoning death is paramount to the Christian faith.
Here is something interesting, Mark writes that Jesus gave the cup to the disciples and they all drank from it. This sticks out to me. The disciples drank of the cup which symbolically represented the blood of Christ. All of them drank from it. We do the same. When we come to Christ we drink of Christ; in a sense we partake of him. They drank in preparation of what was about to happen, we drink from what has now been accomplished. It is a picture of us becoming a part of Christ.