A dark painting (Describing a feeling)

Today, I want to describe the strong sensation this painting makes me feel. The author of this painting is the spanish Goya and he painted ''Saturno devorando a sus hijos'' (the title of the work) during one of his dark periods.
To me, it is clearly a pessimistic vision of the world because when I see this picture, I cannot help thinking about how cruel the world can be. Maybe, that is the metaphor Goya wanted to express: If someone is enough inhuman to kill their own children, what is the humanity capable of?
It is a strange feeling that I do not like to have but that I consider it is  interesting because it can makes you stop and think about the world and how we could mend it.