NASHVILLE — LifeWay Christian Stores has begun the process of acquiring Berean Christian Stores, a 17-store chain located primarily in California, Arizona and the Midwest with corporate headquarters in Cincinnati. “This is a tremendous opportunity,” said Thom S. Rainer, president of LifeWay Christian Resources, the parent company of LifeWay Stores. “Berean, like LifeWay, is known for their commitment to serving…