The New Testament is no less concerned with the writings that commands believers to love each other in real practical ways and to build up the body of Christ. This necessitates personal involvement, relationship, communication and working together for the kingdom of God and these are impossible challenges unless God’s people meet together often.
Believers often bring with them from their childhood a distaste for organized religion, which leads them to throw out the baby (fellowship, working together) with the bathwater (dead institutional forms, perfunctory attendance at meetings without genuine communion).
Without purposeful contact with other believers fruitful work for the kingdom soon ceases, prayer becomes dry, the world shrinks, not only social conscience but even social awareness succombs and the person quickly withdraws into a world of his own in which costless discipleship and cheap grace prevail. – David Stern, Jewish Commentary on the New Testament