" My cough is much worse at night and often prevents me from sleeping. It is not so much the daytime tiredness that I resent, but the inability to proceed uninter- rupted with my dreams, to run and play with my fancies, and, at last, in the early hours of the morning, to be visited with visions like a holy madman. The dreamer is like a Delian diver, fishing for pearls from the depths of our inner sea of knowledge; and I must have solved, or rather resolved, many more problems in my sleep than in my conscious hours. "

― Neel Burton , Plato: Letters to my Son