If the preaching of Jesus consists of the assumption of New Testament theology, according to Bultmann’s thought, the analysis of its content emerges as fundamental for the understanding of the Christian kerygma and the literary-theological construction of the primitive community. In this way, the article focuses on Jesus’ ethical-eschatological preaching, which announces the kingdom of God and the time of decision and the call for decision, which converges to radicality and demands eschatological obedience as the fulfillment of God’s will. Thus, escaping the condition of a duty that converges to the formation of character and the principle of determination of human communion, the article points out that it is the demand for love that imposes itself on Jesus’ eschatological preaching and his ethical preaching and the knowledge of God’s will, which implies the must-be and the can-do involving unconditional good in a theoretical-conceptual and subjective-existential construction that involves awareness of the limit situation of existence and the need for an existential decision.