We esteem "big hearts" in Christianity today. Men and women of compassion, tender mercies, and deep affections are essential for a working Body. However, there is not the same esteem for "big kidneys" in the Church today—men and women who speak straight about sin, demand purity within the Body, and protect the health of the Church. Big kidneys are rather offensive to our modern sensibilities. But the Bible makes it clear that without functional kidneys in the Church, heart disease will set in. While the heart circulates life within the body the kidneys purify that life. The Bible calls the heart and kidneys the "heart and the reins." God tests the hearts and reins of His people to ensure that they are functioning as they ought. For health to reign within the individual body and the corporate Body of Christ, we must have functional hearts AND functional kidneys.