The baptism into the body of Christ, 1 Cor 12: 13, Is the rebirth, NOT water baptism.
Please note, "By one SPIRIT, we are baptised into the body", NOT by WATER.
THe bible is its own best commentary:
Jn 3:5-------spirit++++++++++++++
water>>>>>>>>>>>>in the kingdom
1Cor12:13---spirit+++++++++++++
baptized>>>>>>>>>>>in the body
"In the kingdom" and "in the body" are equivalent terms iwth both referring to being sved. Since there is just ONE way to be saved, no alternatives, then both of these verses MUST express the same idea, which they do:
Spirit is equivalent to spirit
water is equvalent to baptized
in the kingdom is equivalent to inthe body.
Furthermore there is "one baptism" in effect, Eph 4:5. In 1 Cor 1:14,16 Paul WATER baptized some of the Corithians himself, Paul being a human disciple carrying out the human adminstered water baptism of Christ's great comission. So 1 Cor 12:13 is that one water baptism of Mt 28:19,10; Mk 16:15,16; Jn 3:5; Eph 4:5, 1 Cor 1:14,16.