The manifestation of the kingdom of the heavens is the heavenly part of the millennium. This manifestation is the kingdom of the Father. Matthew 13:43 says, "Then the righteous shall shine forth as the sun in the kingdom of their Father." The righteous are the overcomers, who will be the light shining in the kingdom of their Father. In the heavenly part of the millennium, which is the manifestation of the kingdom of the heavens and the kingdom of the Father, the overcoming saints will reign with Christ as co-kings.