The Holy Spirit is the Universal Spirit of Mind
"The Holy Spirit IS the Universal Inspiration, the mind's stimulator. The Holy Spirit is literally in you because God placed it in your mind, and although you can keep it asleep you cannot obliterate it. God Himself keeps it alive by transmitting it from His Mind to yours as long as there is time. It is partly His will and partly yours. The miracle itself is just this fusion or union of will between Father and Son." Taken from "A Course in Miracles"