When you are standing somewhere-- in this case the 59th subway platform-- and you suddenly have the scene or phrase, the words. I had been struggling toward this for months, and, of a sudden, there it was. It was so clear I could almost hear a sound as it fit into place. It made a sound like 'Snock.'
Now I know how to go, I know what they said next. So strange how it happens that way, and such a relief!