We were MADE for community.
Every single one of us is made in the image of the one and only Triune God. For all eternity, God has existed as one divine community with three divine persons in Himself: Father, Son and Spirit. Forever and ever, Father, Son and Spirit have delighted in, glorified, and loved one another. Being made in the image of this kind of God has many profound implications (and applications), but one thing is for certain: life is not meant to be lived alone. We human beings were created for community. We need each other. We need fellowship.
We WERE SAVED FOR COMMUNITY.
When we put our faith/trust in Jesus, God adopts us into His family. It is a big family with lots of diverse people in it. It is within this large, extended family called "the Church" that God mediates His care to us and through us, even as we learn how to better love Him, others, and this world.