Dr. Smalley's exhaustive commentary on the Greek text of the letters of John argues that they, together with the Fourth Gospel, record and reflect the spiritual history of the Johannine community itself. These letters contain theological, ethical and practical truths that are fundamental to the Christian position in every age: that Jesus is one with God as well as one with us; that love and righteousness are indispensable to the believer who seeks as a child of God to walk in the light; and that unity, however flexible, is a demand laid upon the whole Church at all times.