King Lear by William Shakespeare frightens me. I've never done King Lear, I guess partially because my father dwindled into dementia in his last years and King Lear is such an accurate portrayal of a father figure suffering from dementia - the play was almost intolerable for me.
Illness is the night-side of life, a more onerous citizenship. Everyone who is born holds dual citizenship, in the kingdom of the well and in the kingdom of the sick.