Pain. Horrible at its core, yet the cause of so much beauty. What is peace without war? What is freedom without oppression? Joy without suffering? In life, everything is on a spectrum. You can not notice the good in something without first experiencing the bad. You wouldn't be able to be happy without suffering at one point. In order to appreciate one end of the spectrum, you must understand the other. If good is all you have ever known, then it will get boring, old, lose its value. Likewise, if you have only lived through pain and suffering it will have desensitized you to the cruelty you are facing. Although inherently negative, pain is the bringer of joy. It can bring appreciation, and optimism, or it can lead to monotony and pessimism. It is a necessity of life, because without suffering there is no living, there is only surviving.