The scriptures show us that there are three, God, His Holy Spirit and Jesus. All three are distinct from each other and can operate individually, but the point is they are all the same Holy Spirit. The minute we see Them as three individual spirits we have jumped the fence into polytheism. God is one Spirit (John 4:24), the Holy Spirit is His Spirit (Matthew 20:20) and Jesus is the Son of God, God's image or physical representative (theophany) and the Messiah, our Redeemer. God's Holy person/being remains in heaven and He operates through His Spirit in His Son. The Holy Spirit unifies the persons of the Father and the Son. We see this union taking place in Isaiah 42:1. Even though we see them as three individuals at Jesus' baptism, it does not negate the fact that they are one Spirit, because God's Spirit is omnipresent and can be in more than one place at a time. He is in Jesus in the water, (the Life in Himself John 5:26) descending to Jesus the Man and in heaven at the same time.