The faithful know that it is the Body of Christ if they don't neglect to be the Body of Christ. May they become the Body of Christ if they want to live of the Spirit of Christ.
You hear «The Body of Christ», and you reply «Amen». Be part of Christ, so that your «Amen» is true.
Your prayer is a conversation with God. When you read, it is God who is speaking, when you pray, it is with God that you are speaking.