"The activity of God .... The moving force .... The Spirit is the infinite 'breath' of God, the life essence of Being. 'And when he had said this, he breathed on them, and said to them, "Receive the Holy Spirit" '(John 20:22)" (RW/Holy).
"The functions ascribed to the Holy Comforter or Holy Spirit or Spirit of truth imply distinct personal subsistence: He is said to speak, search, select, reveal, reprove, testify, lead, comfort, distribute to every man, know the deep things of God, and He can be known by man only through his spiritual nature" (Mysteries of John 141).
"The spirit of God moves upon the love of God, and the love of God is Holy Spirit" (Unpublished Fillmore Jan 27 1929 11).
"We have, potentially, the Holy Spirit within us. We couldn't live a minute without a certain degree of Holy Spirit activity; but we can enlarge that. We can enlarge it to the point that we shall have the All of Holy Spirit working in us and through us" (Unpublished Fillmore Jan 27 1929 23).
The Holy Spirit is defined as the moving force or the activity of God. This activity brings the absolute aspects of God's nature into our relative experience. The Holy Spirit moves/stirs/brings into being. It is the energy of God in motion, bringing divine ideas into expression. It is always working in us to bring us into a greater realization of our oneness in God.