In the original language of the New Testament, the Greek word ecclesia (Εκκλησία) denotes a people, an assembly, that has been called out. As such the church is not a physical building, but rather a group of people that has been called out of the world by God. Furthermore, the church should form a community whose relationships are not limited to once a week on Sundays. Acts 2:46 describes a communal living that was day by day and from house to house. In addition, the New Testament uses the word fellowship to describe the interactions between members of the church. Fellowship is different from socializing in the world. 1 John 1:3 shows that fellowship implies the presence of God and His Son Jesus Christ in our relationships and interactions as members of the church.

Acts 2:46 And day by day, continuing steadfastly with one accord in the temple and breaking bread from house to house, they partook of their food with exultation and simplicity of heart.
1 John 1:3 That which we have seen and heard we report also to you that you also may have fellowship with us, and indeed our fellowship is with the Father and with His Son Jesus Christ.