A Christian without a church family is like a bee without a hive. Believing without belonging makes you a spiritual orphan. You have to be connected. And the way to get connected is not in a crowd to a hundred people or more, but in a cell where you're connected to six-eight people at the most. Small groups are relational. You cannot have a conversation with a crowd. You can't ask questions in a crowd. You can't pray specifically in a crowd. You can't get support in a crowd. But in a small group with three, four, five people you can do that.
A church must grow larger and smaller at the same time. Larger through celebration service (Sunday Service); smaller through small group fellowship (Home Cell).