In its classical expression Christianity means a new life which God makes available for all who become apprentices of His Son Jesus Christ. Now sinful men cannot unaided appropriate the blessings of that life. Besides the message of the Prodigal who “ came to himself” the Gospel exhibits in the Cross divine love that has entered the far country and suffers the ordeal inevitably imposed there by human sin. Really to hear the Gospel is to respond in penitent love to the God who was in Christ reconciling the world to Himself. But how shall men hear unless there be preachers? The Gospel by God's gracious provision is brought to each new generation by those who enter into the apostolic tradition; apostolic, because in history we depend upon those who were the first eye-witnesses of Jesus and His resurrection. Nevertheless the apostles preached under the authority of the Holy Spirit who testifies to Christ and proceeds from the eternal life of the Father and the Son (see John 14.26; 15.26 f.). Paul the apostle preached in the power of the Spirit (Rom. 15.19; 1 Cor. 2.4); it was God who had given apostles to the Church, inspiring them with wisdom and knowledge (1 Cor. 12.8, 28). We find similar testimony in Eph. 3.5 (a revelation disclosed to the apostles and prophets by the Spirit); 1 Pet. 1.12, which links preaching and inspiration; and Acts where we read of men filled with the Spirit, like Stephen and Philip, going out as evangelists.