Believers need the Holy Spirit to function properly in their calling. Being under the influence or power of the Holy Spirit makes our lives and journey very easy. Nobody can do the will of God without the Holy Spirit. He is only person who can empower you to function actively or effectively in the things of God. Whether you are a businessman or woman, pastor, prophet, bishop, president, etc. You need Holy Spirit! Holy Spirit is the spirit of God who empower men of God to do his work. It is difficult or impossible to work with God without the Holy Spirit because you cannot do things right. Operating under his power brings you into the realm of his authority. I mean you see his acting power real in manifestation.