On the Road Part 2, Chapter 10
Marylou secures a hotel room on credit. They don't see Dean for a week and Sal says that he has lost his faith in him. Marylou has lost interest in Sal because Dean isn't around to be made jealous. She meets a rich man with a Cadillac at a night club, and leaves with him. Sal walks the streets of the city delirious and thinks that a woman in a restaurant is his mother. He reflects on his life.
"And for just a moment I had reached the point of ecstasy I had always wanted to reach, which was the complete step across chronological time into timeless shadows, and wonderment in the bleakness of the mortal realm, and the sensation of death kicking at my heels to move one, with a phantom dogging its own heels, and myself hurrying to a plank where all the angels dove off and flew into the holy void of uncreated emptiness, the potent and inconceivable radiances shining in bright Mind Essence, innumerable lotus-lands falling open in the magic mothswarm of heaven." Part 2, Chapter 10, pg. 173
He waxes philosophical and religious and then returns to the hotel room. Marylou does not return.