Try to forget all ideas of fellowship that you have. Fellowship in the early church was not just defined by a gathering that had punch where they got to know each other better. Actually, this time of fellowship had never been seen before. The Greek word used here is “koinonia” is not found in the gospels. This is the first occurrence in the New Testament. The root idea is “commonness” or “commonality”. Every time the word is used after this in the New Testament it denotes some kind of sharing. Either sharing something with someone or sharing in something that someone else is experiencing. The foundation of the early church’s fellowship was giving. Fellowship cost something in the early church unlike many of the communities we find ourselves in today. Fellowship wasn’t a sentimental feeling of oneness for them it was a fellowship that was built off of giving. It was relationships that viewed the other and their needs above themselves. It was a community that in one accord saw mutual submission and sacrificial giving as vital. 

And we need to remember who the early church was made up of because this would not have been the normal way of life before so many came to salvation after Pentecost. This new family was made up of Jews and Gentiles who were far off. People with different heritages and religions now come under the same banner. People who may have had generational hate for each other are now called to mutually give for the benefit of each other. It is a fellowship that is preeminently a work of the Spirit.