The Orthodox view is that the Holy Spirit proceeds from the Father, as it says in the Gospel of John. Various Roman arguments for the Holy Spirit proceeding from Jesus also have been put forward, including the idea that as the Son has all that the Father has, he also has the quality of having the Holy Spirit proceed from him also. (Specious argument.) Another view is that the Holy Spirit originates with the Father and then also proceeds from the Son. Either way one is quibbling over words. The first 7 E.C. were the tradition the Orthodox chose to remain faithful to, seeing the Filioque as a departure from their teaching. 
    These definitions, apart from Scripture, are problematical as they can limit one's encounter with the Spirit to what one imagines coneptually, instead of n encounter directly, beyond concept, which is the essence of the mystical, another word that may confuse for some instead of clarify. 
    The Spirit in the human person is the spiritual church.