 The power of the Holy Spirit isn't rain from heaven, it's a flood from within. It's when what is already in me begins to flow through me and affect the outer shells of who I am. That's how you activate the power of the Holy Spirit quite simply through surrender. You want His power? You have to die to self. You have to pick up your cross. You have to lose your life in order to find it. You have to walk in obedience to God's Word.