In a Gotham episode, the penguin, which I believe we see very much to has his ways of defining things, just like, Lex did in Smallville, and to be precise, it was in the Smallville series finale he said it; we are only as great as our heroes. This quote was also mentioned or something like it in the Red Hood episode of Gotham, only the penguin said, our enemies defines us. To be at it again, then I have the bow and arrow in my mind, so that to shoot off the arrow and how far it goes, only depends on how well we stretch the bow, the same is with the enemies.
The more evil our enemies are, the more huge we become, that is if we go by that philosophy of everything to have an opposite. If we would take the philosophy, which is actually quite true, we could compare ourselves to others to get a relativity of how big or how small we are compared to how big we can be. The theory of tightening the bow to shoot off an arrow would be the same theory. I remember it clearly from the Smallville series finale that Lex says very clear to Clark, that we are only as big as our enemies are big, or something like that.
Looking at opposites, then it could be the same as a vortex, a tornado, okay to make it simple then we have to force a minus in nature to get a bigger plus, there we have our tornado, the effect of a tornado as the enemy of cities, something has to be started from somewhere otherwise we can’t get that beautiful spin from a tornado. It is the same with summer and winter, in the north and south region rain falls as snow etc. and is most people’s enemy when they are heading for work. So as said, the bigger enemy, the bigger hero.