You will see rhetoric devices every single day of your life in anything from billboard signs to political debates. Rhetoric is manipulating the way you present your cause through logos, pathos, ethos, kairos, and exigence, in order to persuade your audience. Logos is using statistics such as an amount of money raised or an average death rate of a disease. Pathos is using emotions such as using children or cute animals in an advertisement or guilt-tripping the audience. Ethos is using credibility and is basically saying "you should believe me because I'm well known and know what I'm talking about". Kairos and exigence is what happened or failed to happen that compelled you to speak out about your cause.
