These lines are from J. F. Kennedy's speech announcing the assassination of Martin Luther King. In these lines J. F. Kennedy is making an appeal to audience's ethics. The ethics are a community's or society's guiding beliefs. The sentence,<em>"</em><em>to tame the savageness of man and make gentle the life of this world. Let us dedicate ourselves to that"</em>is making an appeal to audience's ethics.
Pathos are appeals to emotions, while logos is appeal to reasoning/logic.
There is no such word as "rhetros" to mean any appeal to something in a speech.
