This is obviously the converse of John iii.

5, where it is said that we do not know the way of the Spirit, which is like the wind, &c.

And yet the exact verbal similarity of the phrase [Greek: oiden pothen erchetai kai pou hupagei], and its appearance in the same connection, spoken of the Spirit, leads us to think that there was--as there may very well have been--an association of ideas.
This particular phrase [Greek: pothen erchetai kai pou hupagei] is very characteristically Johannean.

It occurs three times over in the fourth Gospel, and not at all in the rest of the New Testament.

The combination of [Greek: erchesthai] and [Greek hupagein] also occurs twice, and [Greek: pou [opou] hupago [-gei, -geis]] in all twelve times in the Gospel and once in the Epistle ([Greek: ouk oide pou hupagei]); this too, it is striking to observe, not at all elsewhere.