The Preaching of the Cross is a pastoral study material based on the text of chapter six of the Epistle to the Hebrews. The writer exposes in his dialogue with the recipients of the epistle the content of the doctrinal themes that they received from the beginning of their conversion, and by the way that the writer exposes them in relation to their spiritual growth and maturity, we note that these doctrinal themes were in their time the doctrinal ensemble of what eventually became known as the doctrine of the apostles. The preaching of the Cross is the main message of the Gospel of the Kingdom of Heaven preached from the time when John the Baptist began to preach, until the resurrection of Jesus, when the cycle of the work of redemption for humanity was closed. Thus, then, the preaching of the Cross became the collection of the basic doctrines of Salvation and Eternal Life.