He gives us the strength to say “no” to sin, and so, “yes” to God — say “yes” to God — and to say “yes” to obedience. And only God can do that. The Holy Spirit is God, and he does those mighty works in our lives and in our world. He rules over every event. He saves us, literally. He brings salvation that Jesus Christ earned into our lives and makes it ours. And He continues to change us until we meet Jesus someday.