And those who receive His gift of righteousness and live in it shall reign with and under Him in this life and in the millennium. When we walk in the flesh and sin in this life, we are not living in His righteousness. When we return to earth with Him we shall live in His righteousness 100% of the time in the millennium
Romans 5:17 For if by one man's offence death reigned by one; much more they which receive abundance of grace and of the gift of righteousness SHALL REIGN IN LIFE BY ONE, JESUS CHRIST.
Revelation 20:6 Blessed and holy is he that hath part in the first resurrection: on such the second death hath no power, but they shall be priests of God and of Christ, and SHALL REIGN WITH HIM A THOUSAND YEARS.
Luke 1:31 And, behold, thou shalt conceive in thy womb, and bring forth a son, and shalt call his name JESUS. 32 He shall be great, and shall be called the Son of the Highest: and the Lord God shall give unto him the throne of his father David: 33 And he shall reign over the house of Jacob for ever; and of his kingdom there shall be no end.
Romans 15:12 And again, Esaias saith, There shall be a root of Jesse, and he that shall rise to reign over the Gentiles; in him shall the Gentiles trust.
1 Corinthians 15:24 Then cometh the end, when he shall have delivered up the kingdom to God, even the Father; when he shall have put down all rule and all authority and power. 25 For he must reign, till he hath put all enemies under his feet.
Revelation 11:15 And the seventh angel sounded; and there were great voices in heaven, saying, The kingdoms of this world are become the kingdoms of our Lord, and of his Christ; and he shall reign for ever and ever.
