those words regarding the flesh of that (this, Jesus') generation who were still to be baptized with water symbolizing being born of women.
Why in the world would there be a need to "symbolize" being born of a woman, when EVERYONE on the PLANET has done this in reality!
The Water is water baptism, symbolizing buried with Christ into his death...
"Therefore we are buried with him by baptism into death: that like as Christ was raised up from the dead by the glory of the Father, even so we also should walk in newness of life. For if we have been planted together in the likeness of his death, we shall be also in the likeness of his resurrection:"