¹ sn What is born of the flesh is flesh, i.e., what is born of physical heritage is physical. (It is interesting to compare this terminology with that of the dialogue in John 4, especially 4:23, 24.) For John the “flesh” (σάρξ, sarx) emphasizes merely the weakness and mortality of the creature – a neutral term, not necessarily sinful as in Paul. This is confirmed by the reference in John 1:14 to the Logos becoming “flesh.” The author avoids associating sinfulness with the incarnate Christ.

² tn The same Greek word, πνεύματος (pneumatos), may be translated “wind” or “spirit.”

³ sn Again, the physical illustrates the spiritual, although the force is heightened by the word-play here on wind-spirit (see the note on wind at the beginning of this verse). By the end of the verse, however, the final usage of πνεύματος (pneumatos) refers to the Holy Spirit.