Does 'all' in the verse about being baptized into one body mean every believer or only a chosen few?

In this context, “all” means every believer, not a chosen few. The text states all are baptized into one body, the body of Christ, and every believer is connected to the Head. So the term is inclusive of all church-age believers, not limited to an elite group.

Les explains that the word “all” is not just the chosen few but every believer. We are all baptized into one body, the body of Christ, which is likened to the human body. Every believer is connected to the Head. Les further notes that Paul never uses the sheep-and-shepherd illustration for church-age believers, because being an intrinsic member of the body connected to the Head is greater. This gives believers their position in Christ and is the higher plane Paul presents especially in Ephesians, Philippians, and Colossians.

Are all believers baptized into one body, or only a chosen few?

Every believer is baptized into one body, not merely a chosen few. The body is the body of Christ, and every believer is connected to the Head. This union gives each believer their position in Christ, making them intrinsic members of His body rather than sheep under a shepherd.