Counting the Omer is not just a mitzvah, but is a mitzvah based in Kabbalah. We are instructed to count the Omer, but what are we counting? Why count 49 days of the Omer at all?
In Season 5 of the CW show, Arrow, the (spoilers) Green Arrow is captured and forced to recognize his own sins. He comes to the realization that he has enjoyed killing people and disguised it as a righteous crusade.