Heaven is a place everyone wants to go, but what will we do when we get there? Some imagine Heaven as a place “up there” in the clouds somewhere where we will all sit around in white robes plunking on harps. Everyone looks forward to seeing friends and loved ones there (provided they chose Jesus during their time on earth). The last two chapters of the book of Revelation describe Heaven as a recreated earth with a “new Jerusalem” in the form of a cube 1500 miles cubed – that is 3.375 billion cubic miles. The description is beautiful beyond imagination, but it is a physical place where the saints will be employed as “kings and priests.”
The phrase “kings and priests,” in Revelation 1:6, is best understood as “kingdom of priests” or, as some translations have it, “royal priesthood.” Jesus is “KING OF KINGS AND LORD OF LORDS” (Revelation 19:16). That statement itself suggests that there are other kings and other lords, but Jesus rules over all of them. Revelation 1:5 says:
And from Jesus Christ, who is the faithful witness, and the first begotten of the dead, and the prince of the kings of the earth. Unto him that loved us, and washed us from our sins in his own blood, (emphasis mine).
“Prince” translates the Greek word archōn, which means “first” or “chief ruler.” That establishes Jesus’ reign as supreme. Below Him is His “kings and priests” who reign with Him, but are subject to Him. Dr. Henry M. Morris, founder of the Institute for Creation Research, writes:
Those who were slaves became kings and priests, (or “a kingdom of priests”) seated with Him in heavenly places (Ephesians 2:6) and serving as a holy priesthood, offering up spiritual sacrifices to God (1 Peter 2:5). In the coming Kingdom, He promises that we shall actually “reign with him” (Revelation 20:6; 2 Timothy 2:12). But though we shall reign with Him, we are still His servants (Revelation 22:3) and it will be our joy to acknowledge His glory and dominion forever.
Other scriptural confirmation (all emphasis mine):
But ye are a chosen generation, a royal priesthood [kingdom of priests], an holy nation, a peculiar people; that ye should shew forth the praises of him who hath called you out of darkness into his marvellous light (1 Peter 2:9)
And he that overcometh, and keepeth my works unto the end, to him will I give power over the nations: And he shall rule them with a rod of iron; as the vessels of a potter shall they be broken to shivers: even as I received of my Father (Revelation 2:26-27).
And I saw thrones, and they sat upon them, and judgment was given unto them: and I saw the souls of them that were beheaded for the witness of Jesus, and for the word of God, and which had not worshipped the beast, neither his image, neither had received his mark upon their foreheads, or in their hands; and they lived and reigned with Christ a thousand years. (Revelation 20:4)
Do ye not know that the saints shall judge the world? and if the world shall be judged by you, are ye unworthy to judge the smallest matters? (1 Corinthians 6:2)
But the saints of the most High shall take the kingdom, and possess the kingdom for ever, even for ever and ever … And the kingdom and dominion, and the greatness of the kingdom under the whole heaven, shall be given to the people of the saints of the most High, whose kingdom is an everlasting kingdom, and all dominions shall serve and obey him (Daniel 7:18, 27).
So, regardless of whatever else will occupy our time in Heaven, one of those tasks will be to serve as kings and priests in service to the KING OF KINGS AND LORD OF LORDS. Hope to see you there!
 Henry M Morris, The Revelation Record, (Tyndale House Publishers, Carol Stream, Ill., 1983), 38.