The central message of this sermon is that God's plan of salvation has shifted from the Jewish nation to a new entity, the Church, composed of individuals from various backgrounds who have placed their faith in Jesus Christ. The parable of the wedding feast serves as a backdrop for this transition, illustrating the rejection of God's offer by the Jewish leaders and the subsequent removal of the kingdom from them and its transfer to a new people. This shift is not about a change in God's character or nature, but rather a change in His method of working through humanity, from one specific ethnic group to a global community united by faith in Jesus Christ. The sermon highlights that this transition is fundamental to understanding the Bible and history, emphasizing the importance of recognizing the church as the new vehicle of salvation.