WHO WALKS UNSEEN THROUGH OUR HOMES AND STREETS? THE SPIRIT OF CHRIST:
“We want the HOLY SPIRIT, which is JESUS CHRIST.” — (E.G. White, Lt66, April 10, 1894)
So we can add to this quote CHRIST BY HIS SPIRIT.
“We need to realize that the Holy Spirit, [CHRIST BY HIS SPIRIT] who is as much a person as God is a person, is WALKING through these grounds, UNSEEN BY HUMAN EYES; ... HE HEARS EVERY WORD WE UTTER and knows every thought of the mind” — (E.G. White, 2SAT, pp. 136, 137, 1899)
QUESTION 1: Who was WALKING through those grounds, through our streets, and by our side and hears every word we utter?
“CHRIST WALKS UNSEEN THROUGH OUR STREETS. With messages of mercy He comes to our homes.” — (E.G. White, MH, p. 107)
“How few realize that JESUS, UNSEEN, IS WALKING BY THEIR SIDE! How ashamed many would be to hear His voice speaking to them, and to know that HE HEARD ALL THEIR FOOLISH, COMMON TALK!” — (E.G. White, 14MR 125.3)
“Remember that JESUS IS BESIDE YOU WHEREVER YOU GO, noting your actions and LISTENING TO YOUR WORDS.” — (E.G. White, YI, Feb 4, 1897)
QUESTION 2: Who is the person of the Holy Spirit who is unseen by human eyes?
“The human agent, the seen instrument, is to preach the Word, and the LORD JESUS, THE UNSEEN, AGENCY, BY HIS HOLY SPIRIT is to make the Word efficacious and powerful.—Letter 105, 1900.” — (E.G. White, 2SM 18.3)
“He [CHRIST] is an UNSEEN PRESENCE in the PERSON OF THE HOLY SPIRIT,” — (E.G. White, DG, 185.2, 1897)
The answer never changes. There are a few quotes from Ellen White that can be misunderstood on their own as you have just seen. But letting SOP explain SOP, there is no mistaking she was referring to the SPIRIT OF CHRIST every time.
The Comforter is the SPIRIT OF CHRIST,
the Spirit of truth is the SPIRIT OF CHRIST,
the third person is the SPIRIT OF CHRIST,
the third great power is the SPIRIT OF CHRIST,
the Holy Spirit given at Pentecost was the SPIRIT OF CHRIST,
the Holy Spirit Jesus breathed on His disciples was HIS own SPIRIT,
the Holy Spirit Christ sent to represent Himself was HIS own SPIRIT,
the Heavenly trio is the Father, Son and SPIRIT OF CHRIST,
and she reveals over and over again that there are only two beings in the Godhead.