"Kairos" is the right rhetorical moment, it is a special notion of space and/or time; situational time, similar to opportunity. In my book, this window of time is compared to a sprinter who knows just when to accelerate in order to beat their competition during a race. While reading an article on CNN.com today about Rhianna and Chris Brown's relationship, the author used kairos at the right time when she introduced why victims of abusive relationships go back to the perpatrator. Reasons include the period after an abusive event where apologies and over-compensating acts take place, and how instinctively humans who are attached emotionally have to stay in the relationship in order to survive. The subject came about smoothly within the article.