The Holy Spirit is the Spirit of God and Spirit of Christ
The Biblical data completely repudiates the idea that the holy Spirit is not the Spirit of God and Spirit of Christ. While we understand from sister White that the holy Spirit is the 3rd Person of the Godhead, a conscious, distinct personality outside of the tangible forms of Father and Son, It is still the actual Spirit of God and His Son. Any doctrine that says otherwise does not pass the test of inspiration.