It is God's job to draw, call and convert a person. Many times when a person first comes into the truth and is baptized, he just wants to tell everybody because he has his first love and it is so exciting to let other people know this knowledge.
"Calling" is the action of God in summoning people to sanctified responsibilities.
If God calls a person to a duty or responsibility, the called person has a commission to commit himself to it. In addition to this authorization, there is the element of compulsion. If God calls a person, it is never in doubt that a person is under obligation to obey the summons.
The general calling is the call of God to believe in Christ as Lord and Savior and to follow their instruction for living. Unique specific callings are God's leading a person into specific duties and responsibilities in life.
Jesus Christ's body is a multi-faceted symbol. Sometimes Christ's body is a symbol of His death, but at other times it is a symbol of life. So, it says here that the Passover bread represents Christ's body. When Jesus uses bread as a symbol for His body, it is a symbol of life, even eternal life. We won't turn to it, but John 6 explains this symbol very clearly. There, Jesus speaks of bread that endures to everlasting life. He speaks of the bread of God, the bread of life, and the living bread. When Jesus says that He is the living bread (John 6:51), it means that His flesh is not merely something that leads to eternal life, but He indicates a body that is alive. As we partake of the bread, we become one with the living Savior.