The Holy Spirit is the third person of the triune God, coequal, coexistent, and coeternal along with the Father and the Son. He is omnipotent, omniscient, and omnipresent. As God, he has always existed, and he always will.
This power, this real power straight from heaven, the power of the presence of God in our lives for all eternity, is not something you can step into and out of at your leisure. Game Changer: The presence of the power of the Holy Spirit is an ongoing reality for those who trust in Jesus, not because you perform but because he has promised.