knowledge. Prophecy gives warning of what is to come, through the revelation of future events. Public speaking is the admonishing of the people to maintain the well-being of the community. By means of what is called “preaching”—instruction in matters of faith and behavior—two aspects of theology may be introduced: that which appeals to the reason and deals with the knowledge of spiritual matters, and the ethical, which offers teaching on the living of a good life. For preaching sometimes teaches