There is always confusion or lack of understanding about the "kingdom of God" versus the "kingdom of heaven". From the Bible, the kingdom of God is about your personal walk with the Lord and living a righteous lifestyle. Faith is the primary factor as we walk with the Lord that we please Him, and we can't judge each other's walk. The kingdom of heaven, on the other hand, is a location, maybe not physical like earth, but still a place we are desirous of living in eternally. Holy Spirit, Jesus and the Father/Creator reside in heaven, not to mention those who believe and accepted Jesus.