Open flame.

In one of my Psychology lectures last year, we learned that pain is necessary. When you hover your palm too close over an open flame, your body registers the sting and you instinctively withdraw your hand to avoid any permanent injuries. Some people try so hard to wish away their pain but if you lose the ability to feel pain, it might be too late before you realize your entire body's on fire.

So I choose to be grateful for my pain. Not because I'm some kind of masochist, but because it proves that my body is still alive and still trying to survive. My brain is still sending me warning signals to keep moving forward so that I can put more and more distance between myself and my "open flame".