The speaker stays awake, "listening to the long moan of a train". It heightens her awareness of how soft the pillows feel, how close the darkness looms and how much she adores the man sleeping next to her. She smells the dampness seeping in with the deep scent of pines. The fragrance saturates her lover's shirt and invokes some meditation on their relationship. Her reference to "slim introvert" conveys this man is quiet, very private and reluctant to share his feelings.
She realizes he has suffered a great loss but does not specify the cause. Thoughts focus more on her significant role in his life and recovery. She parallels the metro traveling through those distant woods with the scenes traveling through her husband's mind. She is mentally linked, through rare love and insight, to his reoccurring dreams. Because of this psychic connection, she can feel and perceive their intensity. Although these dreams ride away on the morning's light, her presence will still remain --- like water softening stone, eroding a fine man's pain.