Okay kiddo, so you know how sometimes things can seem like they're completely opposite? Like hot and cold or light and dark? Well, there's a fancy word for when those opposites come together called "coincidentia oppositorum" which means "the coincidence of opposites."
It's like when you have a color wheel and opposite colors like red and green are right next to each other. Even though they seem like they don't go together, they can make a really cool design! Or when you think about the sun and the moon - they seem like opposites because one is out during the day and one is out during the night, but they both give us light in different ways.
In some ways, the idea of coincidentia oppositorum is all about balance. Sometimes things that seem so different can actually come together in a really positive way. It's like when you mix different colored playdough together and it turns into a new color that's really cool! That's what coincidentia oppositorum is - finding a way for opposites to come together and create something new and interesting.