The first great benefit of faith is fellowship. The Greek word here is koinonia, which is a rich word meaning fellowship, partnership, participation, companionship. Life is relational at its core and essence . The very nature of God, three persons in one, confirms this relational essence. John tells us that this fellowship is with one another in the faith, and it is also with God the Father and his Son, Jesus Christ.
Nothing builds a deeper and more lasting intimacy than a common spiritual life.
The relationships between husbands and wives, parents and children go deepest when God is their common center. One of the great challenges in modern America is sustaining long term relationships. We should not be surprised since our culture puts all the emphasis on the wrong syllables. People get married on the basis of sexual compatibility before considering their spiritual harmony. We stress the need to have financial security and to be physically attractive before we work on developing our spiritual maturity.