For by one Spirit are we all baptized into one body. While it is true that baptism is used metaphorically to describe salvation, salvation is never referred to as baptism in or by anything or anyone, unless I Cor. No ground is laid for it anywhere in Scripture. Salvation is not the context of I Cor. In reading Eph.
Regeneration is never the context.
I thus conclude that no place in Scripture ever refers to salvation as baptism in, or by, the Holy Spirit. These people in the church at Corinth had been led by the Spirit to confess Christ, and had by the same Spirit been led to identify themselves with that particular body, by water baptism. The message and exhortation of I Cor. Notice the first and last verses of each chapter are clearly this, and every verse in between is right on that line. Now stop competing for position and pre-eminence, as if you were a unit within yourself, and accept the place in the body to which God has sovereignly appointed you, because you are by the design of God all dependent upon each other.