From Jacques Lacan, "Of Structure as an Inmixing of an Otherness Prerequisite to Any Subject Whatever", a presentation at the famous The Languages of Criticism and the Sciences of Man conference, held October 18-21, 1966 at Johns Hopkins University--
When I prepared this little talk for you, it was early in the morning. I could see Baltimore through the window and it was a very interesting moment because it was not quite daylight and a neon sign indicated to me every minute the change of time, and naturally there was heavy traffic, and I remarked to myself that exactly all that I could see, except for some trees in the distance, was the result of thoughts, where the function played by the subjects was not completely obvious. In any case, the so-called Dasein, as a definition of the subject, was there in this rather intermittent or fading spectator. The best image to sum up the unconscious is Baltimore in the early morning.