The phrases,' tragedy is inevitable and comedy is best when it's unexpected' ring true in the world. I think it's like with your emotions, if you didn't have sadness or pain or loss, you couldn't really appreciate the joy and happiness in life to the fullest. Inside Out illustrates this beautifully. Joy was the first emotion that Riley ever experienced, so of course she'd feel like the leader and would want the best for Riley. Joy didn't appreciate Sadness though. She wanted to keep Sadness in her own little bubble so she wouldn't hurt Riley by making her feel gloomy.But, Sadness showed Joy that happiness isn't the only important emotion; all of them were important and there for a reason. I do believe the Bible is Comedy. You can't have the great stories in the Bible without the tragedy occurring before them. The Bible presents to us just how God can work best in the saddest times. 

“God is the comic shepherd who gets more of a kick out of that one lost sheep once he finds it again than out of the ninety and nine who had the good sense not to get lost in the first place. God is the eccentric host who, when the country-club crowd all turned out to have other things more important to do than come live it up with him, goes out into the skid rows and soup kitchens and charity wards and brings home a freak show. The man with no legs who sells shoelaces at the corner. The old woman in the moth-eaten fur coat who makes her daily rounds of the garbage cans. The old wino with his pint in a brown paper bag. The pusher, the whore, the village idiot who stands at the blinker light waving his hand as the cars go by. They are seated at the damask-laid table in the great hall. The candles are all lit and the champagne glasses filled. At a sign from the host, the musicians in their gallery strike up "Amazing Grace.” 

P.S. Do the emotions in Inside Out have smaller emotions of themselves inside their heads? Joy was crying and showing other emotions throughout the movie. Just a concept I heard about.