I have a number of questions about heaven such as: What is heaven? Where is heaven? Will we have a body in heaven? Will we know one another? Will we remember anything form this life? What will we be doing for all eternity?
In order to properly understand what the scriptures teach about heaven, we need to start with what Jesus says in Luke.
Luk 17:20 And when he was demanded of the Pharisees, when the kingdom of God should come, he answered them and said, The kingdom of God cometh not with observation:
Luk 17:21 Neither shall they say, Lo here! or, lo there! for, behold, the kingdom of God is within you.
In the book of Matthew the phrase, “the Kingdom of Heaven” is used instead of “the Kingdom of God”, so the two have the same meaning.
Mat 3:2 And saying, Repent ye: for the kingdom of heaven is at hand.
We learn about the spiritual things by the things that are made.
Rom 1:20 For the invisible things of him from the creation of the world are clearly seen, being understood by the things that are made, even his eternal power and Godhead; so that they are without excuse:
An earthly kingdom is the territory over which a King has dominion and rule. The King makes the rules and makes the people in his kingdom obey those rules. The Kingdom of God (Heaven) is the same way. When God is ruling our lives, then we are under his authority in his kingdom. Said another way is when the Kingdom of God is within us.
There is this tendency to try and make heaven a physical destination, somewhere we go when we die, but this is not the case. We are in the Kingdom of Heaven whenever God is reigning in our lives. This article will explain more:
So what happens when we die? Anyone who has physically died is asleep, awaiting the resurrection.
Ecc 9:5 For the living know that they shall die: but the dead know not any thing…
Jesus likens death to sleep.
Joh 11:11 These things said he: and after that he saith unto them, Our friend Lazarus sleepeth; but I go, that I may awake him out of sleep.
Joh 11:12 Then said his disciples, Lord, if he sleep, he shall do well.
Joh 11:13 Howbeit Jesus spake of his death: but they thought that he had spoken of taking of rest in sleep.
Joh 11:14 Then said Jesus unto them plainly, Lazarus is dead.
Here in 1 Thess, the dead in Christ will be resurrected, because they were asleep (dead). If they were already with God, then why would they need to be resurrected?
1 Thess 4:16 For the Lord himself shall descend from heaven with a shout, with the voice of the archangel, and with the trump of God: and the dead in Christ shall rise first:
So when you ask questions about what it will be like in heaven, I think you are really asking about what will happen after we are resurrected. Paul answers this in 1 Corinthians 15.
1Co 15:42 So also is the resurrection of the dead. It is sown in corruption; it is raised in incorruption:
1Co 15:43 It is sown in dishonour; it is raised in glory: it is sown in weakness; it is raised in power:
1Co 15:44 It is sown a natural body; it is raised a spiritual body. There is a natural body, and there is a spiritual body.
We will have spiritual bodies, not physical bodies. God is spirit, so we will be like him in that sense… no flesh and blood.
The angels have spiritual bodies, and they are distinct individuals. We know this because the bible tells us about certain angels by name, like Michael for example.
Mat 22:30 For in the resurrection they neither marry, nor are given in marriage, but are as the angels of God in heaven.
Jud 1:9 Yet Michael the archangel, when contending with the devil he disputed about the body of Moses, durst not bring against him a railing accusation, but said, The Lord rebuke thee.
So here we have Michael interacting with another spiritual being, the devil. If we are going to be like the angels, then we will be distinct individuals with spiritual bodies and aware of one another.
God has used this physical experience to teach us about spiritual things, so why would we forget all of that? In our physical world we appreciate more when we look back at what has happened to us in the past. Based on Romans 1:20, it makes sense that God would have us as spiritual beings, to look back upon his physical work to appreciate who God is and what he has done for us.
After Christ has subdued everything, he will turn the Kingdom of God back over to the Father and God will be all in all. This just means that the fullness of the Spirit of God will fill every spirit being fully.
1 Cor 15:28 And when all things shall be subdued unto him, then shall the Son also himself be subject unto him that put all things under him, that God may be all in all.
Once God is all in all, we will all be likeminded, living in perfect unity. We will all be full of the fruit of the spirit of God.
Php 2:2 Fulfil ye my joy, that ye be likeminded, having the same love, being of one accord, of one mind.
This will be true as well:
Rev 21:4 And God shall wipe away all tears from their eyes; and there shall be no more death, neither sorrow, nor crying, neither shall there be any more pain: for the former things are passed away.
We don’t know exactly what we will be doing for all eternity, but we certainly will be enjoying it.
This topic leads to a number of other questions.
Not everyone when they are resurrected will be one with God at that point, so what happens to them?
There is a process that all of mankind must go through in order to be made one with God. My advice is to start with these studies on the Milk Doctrines.
I hope this helps answer your questions,