What if the feeling of sadness was a human 
And he is in a jester costume

The Jester is a representation of sadness as an individual. This idea can be traced back to many ancient sources; in Greek mythology, melaina - the goddess of mourning - wore a jester's hat, and had eyes made out of tears in order to symbolize her nature. In Christianity, the Devil is often depicted as a jester, playing his harp, and in ancient Greece, the god Hermes was also considered a jester