we believe that God has chosen a small number to join Christ as rulers in the heavenly kingdom.
Rev. 7:4: I heard the number of those who were sealed, a hundred and forty-four thousand
Rev 14:1 And I saw, and, look! the Lamb standing upon the Mount Zion, and with him a hundred and forty-four thousand
Rev 5: 10 and you made them to be a kingdom and priests to our God, and they are to rule as kings over the earth.
not all Christians will go to heaven... the majority of mankind will continue to reside on earth as God intended. Jesus called these ones his 'other sheep'
John 10:16 And I have other sheep, which are not of this fold; those also I must bring, and they will listen to my voice, and they will become one flock, one shepherd
for those who will live on earth, if they die, they return to dust and their existence ceases until God resurrects them to life. That will happen in the future during the time of the 'resurrection'....all of mankind who have died (yes everyone, good and bad) will be resurrected to be given a 2nd chance at life under Gods rule.
John 5:28 Do not marvel at this, because the hour is coming in which all those in the memorial tombs will hear his voice 29 and come out, those who did good things to a resurrection of life, those who practiced vile things to a resurrection of judgment
Isaiah 26:19 Your dead ones will live. A corpse of minethey will rise up. Awake and cry out joyfully, YOU residents in the dust! For your dew is as the dew of mallows, and the earth itself will let even those impotent in death drop [in birth]