"Dullness is associated with psychic pain because something that's dull or opaque fails to provide enough stimulation to distract people from some other, deeper type of pain that is always there," namely the existential knowledge "that we are tiny and at the mercy of large forces and that time is always passing and that every day we've lost one more day that will never come back."
from the 'The Pale King" book review by M. Kakutani.