The Holy Spirit is a person, having his own mind, intellect, emotion, and will apart from the
Father and the Son, who also have like. One of the most fundamental characteristics to be-
ing a person (having a personal identity) is having the ability to say
"I", which of course the
Holy Spirit can do.
The Holy Spirit is not the Spirit of the Father or
the Son, he is his own existence, so to speak.
God is the Father, the Son, & the Holy Spirit, each personal and self-aware subjects who
are seen interacting eternally with one another, Father to the Son, Son to the Holy Spirit,
Holy Spirit to the Father, and so forth. There is a metaphysical difference to what a Being
is and what a Person is. I am one being, human being, and I am one person. God is One
being, Divine Being, and God is also Three Persons. So we are talking ONE WHAT and
THREE WHOs.
I’m sure you don’t believe this, but there is an ancient heresy called “Modalism” (Also
called “Sabellianism”), which holds that God is one person in one being, that he is the
Father who became the Son who after ascending into Heaven became the Holy Spirit.
Do Not Believe that!

/QUOT
Don’t worry, I don’t believe that.