David Wilkerson explains that the Promised Land given to Abraham was not merely a physical territory but a symbol of a greater spiritual reality. He emphasizes that Abraham understood this land as a representation of the coming Messiah and a longing for a heavenly city built by God. The true meaning of the Promised Land is found in Jesus Christ, who offers total peace and rest to believers. Wilkerson highlights that through faith, we can claim our everlasting possession in Christ, who is both our inheritance and our hope. Ultimately, the sermon reveals that the promise extends beyond earthly boundaries to eternal life with God.