Where does the teaching about the Body of Christ come from in the Bible?
The Body of Christ is a Pauline revelation. Scripture does not show this teaching until Paul shares the revelations he received from the ascended Lord. In 1 Corinthians 12, Paul explains it as the invisible makeup of all true believers, from every background and place, who become members of that Body.
Les teaches that Paul has been explaining the Body of Christ in 1 Corinthians 12. The Body is that invisible makeup of all believers from wherever they are on the planet and of whatever background; every true child of God becomes a member of that Body of Christ. Les emphasizes that this is a Pauline revelation. You do not see the Body of Christ taught until Paul comes and shares the revelations he got from the Ascended Lord. In the Corinthian letter, Paul addresses problems because the church was still carnal and had not grown spiritually.