Richard Lovelace is correct:
…it is impossible to grow to full stature as an individual while separated from smaller and larger groups in the church, nor can the body grow without the renewing of its members. (Richard Lovelace, Dynamics of Spiritual Life, 19)
Certainly this is much more than simply attending a worship service on Sunday morning, evening, or Wednesday night. This is speaking of a vital union that believers have with one another and that must be lived out in the day to day rhythms of life.