Can I get some advice on writing a critical analysis
on the following passage.

Song of Solomon by Toni Morrison

When she closed the door behind her afternoon guests, and let the quiet smile die from her lips, she began the preparation of food her husband found impossible to eat. She did not try to make her meals nauseating; she simply didn’t know how not to. She would notice that the sunshine cake was too haggled to put before him decide on a rennet dessert. But the grinding the veal and beef for a meat loaf took so long she not only forgot the pork, settling for bacon drippings poured over the meat, she had no time to make a dessert at all. Hurriedly, then, she began to set the table. As she unfolded the white lien and let it billow over the fine mahogany table, she would look once more at the table at the large water mark. She never set the table or passed through the dining room without looking at it. Like a lighthouse keeper drawn to his window to gaze once again at the sea, or a prisoner automatically searching out the sun as he steps into the yard for his hour of exercise, Ruth looked for the water mark several times during the day. She knew it was there, would always be there, but she needed to confirm its presence. Like the keeper of the lighthouse and the prisoner, she regarded it as a mooring, a checkpoint, some stable visual object that assured her that the world was still there; that this was life and not a dream. That she was alive somewhere, inside, which she acknowledged to be true only because a thing she knew intimately was out there, but she needed to confirm its presence. That she was alive somewhere, inside, which she acknowledged to be true only became a thing she knew intimately was out there, outside herself.