What is something that is Yin and Yang to each other that isn't commonly known as such?

honestly, i've always thought about how silence and noise act as a yin and yang pair. like, when i'm working on a tricky repair and everything is dead quiet, i can hear the smallest click or hum that tells me exactly what's wrong with the machine. it's like the silence actually gives the noise its meaning, you know? you can't really appreciate how loud or chaotic something is until you've had that moment of total quiet to contrast it against.

another one that pops into my head is boredom and curiosity. it sounds weird, but whenever i'm just sitting there bored out of my mind, that's usually when my brain starts itching to take something apart or figure out how it works. boredom is like the empty space that forces you to fill it with something interesting. without that lull, i don't think i'd ever get the spark to start a new project or learn a new skill. they’re pretty much codependent.