What does it mean that believers have been made to drink into one Spirit?
It means all believers partake of the one Holy Spirit, who baptizes them into the body of Christ, the church. In Paul's unique revelation, the Spirit places believers into Christ, making the many members one body. This differs from Israel's earlier experience under Christ's earthly ministry.
Les explains that being made to drink into one Spirit means partaking of that One Spirit, so that the body of Christ is not one member but many. This terminology is unique to Paul: the church, which is His body, and the body of Christ, which is the church. Les contrasts it with the earlier Acts setting, where Jesus was the baptizer and placed the Jew into the power of the Holy Spirit for signs and miracles that continued His earthly ministry. But when Israel rejected it and God turned to the Gentile, there was a complete 180-degree turn: the Holy Spirit becomes the baptizer, baptizing predominantly, not exclusively, Gentiles into the body of Christ. He places us into Christ.
More Questions
What has God made all believers do with the one Spirit?
All believers have been made to drink or partake into that one Spirit for the body, and the body of Christ is not one member but many.