The Holy Spirit makes a man a Christian, and if he is a Christian through the work of the Holy Spirit, that same Spirit draws him to other Christians in the church. An individual Christian is not Christian at all.
If ever a man could have felt the church to be unnecessary, he was Jesus. Yet he did not stay away form the church of his day. It was his custom to go to the synagogue on the Sabbath, and he made many trips to the temple.