Jesus says, that God the Father is a Spirit AND Paul says there is one (1) Spirit. How do trinitarians understand who or what the Holy Spirit is?

**Premise** Jesus tells the woman at the well to worship the Father in Spirit and Truth. > 23 But the hour cometh, and now is, when the true worshippers shall worship the Father in spirit and in truth: for the Father seekth such to worship him. 24 God is a Spirit: and they that worship him must worship him in spirit and in truth. - John 4:23-24 (KJV) In this passage we see the only begotten Son of YHWH, once again declaring his God to be the Father (and is a Spirit), who seeks worship as the one true God. Paul makes it clear that there is 1 Spirit. > There is one body, and one Spirit, even as ye are called in one hope of your calling; 5 One Lord, one faith, one baptism, 6 One God and Father of all, who is above all, and through all, and in you all. - Eph 4:4 **Question** ***In light of these two New Testament scriptural passages, how do Trinitarians understand who or what the Holy Spirit of God to be?***