JMNT(i)
12 You see, correspondingly as the [human] body is one [body] and continuously has (possesses; holds) many members (body parts), and all the members of the one body – being many – are one body, in this way, also, [is] the Christ (or: even thus [is] the Anointed One and the Anointing).
13 For we, ourselves – within the midst of one Spirit (or: in union with one Breath-effect and Attitude) – are all submerged into one body (or: were all immersed into, so as to be enveloped by, one body) – whether Jews or Greeks (or: Hellenists), whether slaves or free folks – and we all are (or: were) made (or: caused) to drink one Spirit (or: spirit; Breath-effect; Attitude).