No intention of repeating what everyone else has already said, so here's my unique contribution, so far as this thread is concerned:
Christianity is about a personal, intimate relationship with God.
We are individuals, separate entities apart from God, but seeking union with God. We are seeking Him, on a constant process of discovery and re-discovery of God. The Son, Jesus, also called the Christ, is our guide, our personal spiritual leader.
He is the only One who knows the Way to the Father, God. That's because he's the Invisible Man, who is also an image of the Invisible God, a projection of God, God in identity, though not necessarily in substance. They are One in Identity, separate entities, but One in meaning. When we seek the Son, we are also seeking the Father, as the Father is known through the Son.
We are all coming together. Each of us is a stone that forms God's spiritual temple. Every stone occupies a unique position in the construction of the Temple. Each of us has a place in God's Temple which may also be seen as God's Kingdom.
The Temple represents a static condition -- what doesn't change is our uniqueness in purpose. Life revolves around rituals. Family life, love life, social life and professional life are all driven by rituals. These rituals have their own specific functions, manifesting themselves in relationships. It is as if life is part of some religious ceremony, and the things we do in life are like rituals that we perform inside a physical temple. And so . . . the ceremonial functions performed in the physical temple may be transformed into the everyday life functions that take place in the spiritual temple. In a sense, God's Temple and God's Kingdom are almost synonymous in that both represent everyday life functions, but the Kingdom is about a society -- a dynamic entity. So the Realm of God is both static and dynamic -- static in purpose and identity but dynamic in form.
As each individual draws closer to their intended destiny, their place in the Temple, he/she gets to know more and more about their personal individual identity. But as we draw closer to the place in the Temple, the Christian community begins to discover its collective identity, the combination of all our individual identities combined. In the past we were alone and didn't know our place. In the future we will come to know where indeed we fit in with others. As relationships develop and we discover our own personal identity, the community as a whole starts to figure out its overall, combined identity.
The spiritual temple is our future home. But this temple is in God, as God fills up the whole temple. But we ourselves are a home for God. We are God's temple. So God is our home, our place of comfort (home sweet home), but we ourselves are God's home, the place where God is loved.
In this world, some of us are thugs, junkies, bastards, stillborns, invalids, disableds and nobodies. Others are snobbish, stuck-up, arrogant, haughty, self-indulgent, self-absorbed. Then there are the murderers, liars, philanderers, perverts, etc. At the other end of the spectrum, there are the great scientists and philosophers, the heros and villains, the victors, echelons and the dismal failures, the popular idols, pop stars, rock stars, movie stars, musicians, the famous, the infamous and the losers. The knowns and unknowns. Rich and poor. Conspicuous and unconspicuous. The shy and the confident. Nice and the mean. Politicians, statemen, terrorists and freedom-fighters. Soldiers, doctors, medics, police men, fire fighters and ambulance officers, doing their duty . . . and life is a stage, all these people are just actors in the Great Play.
But in the Kingdom of God . . . there is no difference!!! First and last is the same. God doesn't care who you are, as long as you want to be part of His Grand Story. The Book is still being written . . . maybe just a few more pages. I think I might even know the title -- The Never-Ending Story. Shhhhh. Don't spoil the surprise.
Jesus prayed that we would all be one. God in us and us in God.