I picked this painting because although it is gruesome especially by Goya's use of dark colors, but because it reminds me of the story in Greek mythology of Kronus or Cronus devouring his children. As the youngest of the first generation of Titans Kronus overthrew his father only to be overthrown by Zeus and imprisoned in Tartarus.
Goya uses a lot of black and brown to give a few of shadowing that shows how dark of a person the creature eating his son is. The eyes are wild while the body of the son being eaten is mutilated. There isn't any head, only a body looking like a slab of meat just cut.