The ancient Chinese philosophy of duality, or like Thanos said "Perfectly balanced, as all things should be."
Funny enough this is actually very important in our lives. Where there is light, there also exists dark. Too much of a good thing often turns into a bad one. For example, someone who is used to success tends to develop arrogance and indifference towards others. That is why balance is important. It helps us keep ourselves in check.
Boy! I went full spiritual in this one, didn't I? Do let me know how you like this one. :)
As always, rewards are readily available for download from Gdrive folders.