Jews also believe in the 'Holy Spirit'. However, we see it as simply the manifestation of God's power within creation, rather than as a separate hypostasis within a triune godhead.
Thanks!
Interesting. One of the names/attributes often applied to the Holy Spirit is 'pneumos' or 'breath' (without which there is no life.) So the immanence implied in your realization is there.
With the obvious excepted (Trinitarian theology) we're not all that far apart.