When God (who is spirit) says "my spirit" do Binitarians think He is just referring to Himself?

The following is from a Binitarian answer to a question on the nature of the Holy Spirit: > Instead, the term "holy spirit" could refer directly to the Father and Son, as they are each holy and are each spirits, but more commonly, it simply refers to the medium by which the Father and Son interact with humans and other parts of the physical world. At baptism, the human spirit (which distinguishes us from other animals by providing self awareness and free will (Job 32:8)) combines with some of God's holy spirit to create an embryonic spirit being that someday can be reborn as a full spirit being (John 3:7–8), a literal child of God. It is sensible to talk of the spirit of a man because man is more than just spirit (a man *has* a spirit) but the Scripture plainly states that God *is* spirit: > God is a Spirit: and they that worship him must worship him in spirit and in truth. - John 4:24 So when God says "I will pour out my spirit" in various places, Acts 2:17 for instance, or when He says things like: > Then he answered and spake unto me, saying, This is the word of the LORD unto Zerubbabel, saying, Not by might, nor by power, but by my spirit, saith the LORD of hosts. - Zechariah 4:6 what exactly is being said if the Holy Spirit is not distinct from the Lord? According to Binitarians, is this just a roundabout and awkward way of God referring to Himself; as in "I will pour myself out on all flesh" or "Not by might, nor by power, but by myself"? If, most commonly, the Holy Spirit "simply refers to the medium by which the Father and Son interact with the physical world" why is this power sometimes referred to as Holy Spirit, other times as power (Ephesians 6:10), and why do both terms appear in Luke 1:35 making what appears to be a distinction between the two? > And the angel answered and said unto her, The Holy Ghost shall come upon thee, and the power of the Highest shall overshadow thee: therefore also that holy thing which shall be born of thee shall be called the Son of God. - Luke 1:35