“The Church Fathers, such as Saint Athanasios, the Cappadocians, Saint John Chrysostom, and others had a distinct vision of the power of the apostolic kerygma. Time and again they reflect on the miraculous success of the apostles, with their simple words about the crucified and risen Lord. Not logic and philosophy, but the fishermen’s message, so the Fathers were convinced, saved souls. The truth of the apostolic message was guaranteed by the authority of God and became effective through the power of the Holy Spirit. The spiritual power was in the apostolic message, not in human words of eloquence or wisdom. According to Saint Basil, the message of the Gospel carries the power to overcome souls and arouse them by grace to an unshaken faith in Christ.
The efficacy of the Gospel can be experienced in our midst today when we concentrate on the nature of the Gospel, its blessings, demands, and promises. By way of explication, let us look at several major features of the Gospel. First, priority must be given to the content of the Gospel, i.e., the saving work of Christ, which is the basis of our reconciliation with God, the forgiveness of sins, and new life. The life, teachings, and person of Christ must frequently be proclaimed in simple language as the source of our salvation. Christ must be preached without apology as our crucified and risen Lord–the Way, the Truth, and the Life, and the Light of the world. The heart of the Gospel is Christ Himself, Who dwells in the church and with Whom each Christian is united by faith and sacrament. The primary aim of preaching, according to Saint Basil, is precisely to bring all people under the dominion of Christ within the Church and there to continue to build up their lives in their struggle against evil. Therefore, at every opportunity, whether in worship, preaching, the classroom, group meetings, or church assembly Christ and his work can in suitable ways be “publicly portrayed” (Gal. 3.1) as the ground of salvation. The essential Gospel must not be displaced by advice for better living, noble, moral teachings or even profound theological wisdom–despite the fact that all of these matters have value in their proper place.”
(Theodore Stylianopoulos, The Gospel of Christ, pp. 14-15)