The authors describe the purpose of the sign-miracles and revelatory gifts of New Testament times, and their precise nature. Were they intended to be ongoing in the life of the church? Numerous questions are here answered, such as, "What exactly are the greater works of John 14.12?" and "Are the signs following, referred to in Mark 16, for today?" This work has been helpful to many thousands, having passed through numerous printings in English, and having been translated into many other languages.