What are the motifs in The Sleep of Reason by Antonio Buero Vallejo?

Sanity versus insanity is a recurring idea. Was Goya insane? Leocadia plainly thinks so. She calls Goya's The Busybodies obscene since it pictures a masturbator; Judith and Holofernesparanoid (since she thinks it depicts her as Judith cutting off the head of Goya as Holofernes); lastly, she claims Goya told her that she was the "witch" in Asmodea. She also knows that Goya hears voices. Her strongest reason for thinking Goya insane is his fearlessness of the king's persecution. Buero Vallejo stands behind most of Leocadia's claims. In the first case, she knows Goya gratifies himself, though it is not clear whether Leocadia thinks masturbation, or its depiction, is obscene.