I for one always went along with the concept of the Trinity as a Christian and never thought about this until now. If God is a spirit then why does he have another part of himself called the Holy Spirit? In fact, why does he need that part at all?
My questions:
If God the father, is a spirit, why would he have a seperate part of himself called the Holy Spirit? Is it possible that God is not a spirit being at all, but only part of him is spiritual? (or maybe God the father is not Holy at all?

Please do feel free to quote scripture if you wish.