The passage John 4:23-24, has been viewed by John MacArthur that the word spirit, is not meant the Holy Spirit, but human one.
I've searched through a few commentaries, because I remembered a while back, a pastor Stephen Chan, was one whom I first learned that the word spirit in this passage here is referring to the Holy Spirit, because men's hearts/spirits are in errs often times. So, from this sense, it makes perfect sense. The ones supporting this view, would be Scofield (using v. 24 to justify his claim) and Robertson's Word Pictures (who take both sides).
To reject completely the link of the word as Holy Spirit, is, I think, a bit shallow. I would have to give Robertson credit, for we do have to worship in Spirit, that is in accordance with the Spirit of truth, which is the Holy Spirit, which would result in a genuine worship of our souls.
To say that it is right about the Holy Spirit but this passage is yet touching on that subject, is, I think premature. Just as the premature interpretation of the Elohim "We" in the Old Testament not as trinity but as plural majestic. Just because the mystery is yet to be revealed, it doesn't mean that the subsequent revelation never applies, especially that the mystery is declared by the Lord himself.