In chapter 7, after the car accident, Gatsby stands guard outside of the Buchanan's house to make sure Daisy is safe with Tom. Gatsby and Nick have the following conversation outside the house:

“She’ll be all right tomorrow,” he said presently. “I’m just going to wait here and see if he tries to bother her about that unpleasantness this afternoon. She’s locked herself into her room, and if he tries any brutality she’s going to turn the light out and on again.”

“He won’t touch her,” I said. “He’s not thinking about her.”

“I don’t trust him, old sport.”

“How long are you going to wait?”

“All night, if necessary. Anyhow, till they all go to bed.”

A new point of view occurred to me. Suppose Tom found out that Daisy had been driving. He might think he saw a connection in it—he might think anything. I looked at the house; there were two or three bright windows downstairs and the pink glow from Daisy’s room on the ground floor.

“You wait here,” I said. “I’ll see if there’s any sign of a commotion.”

I walked back along the border of the lawn, traversed the gravel softly, and tiptoed up the veranda steps. The drawing-room curtains were open, and I saw that the room was empty. Crossing the porch where we had dined that June night three months before, I came to a small rectangle of light which I guessed was the pantry window. The blind was drawn, but I found a rift at the sill.

Daisy and Tom were sitting opposite each other at the kitchen table, with a plate of cold fried chicken between them, and two bottles of ale. He was talking intently across the table at her, and in his earnestness his hand had fallen upon and covered her own. Once in a while she looked up at him and nodded in agreement.

They weren’t happy, and neither of them had touched the chicken or the ale—and yet they weren’t unhappy either. There was an unmistakable air of natural intimacy about the picture, and anybody would have said that they were conspiring together.

As I tiptoed from the porch I heard my taxi feeling its way along the dark road toward the house. Gatsby was waiting where I had left him in the drive.

“Is it all quiet up there?” he asked anxiously.

“Yes, it’s all quiet.” I hesitated. “You’d better come home and get some sleep.”

He shook his head.

“I want to wait here till Daisy goes to bed. Good night, old sport.”

He put his hands in his coat pockets and turned back eagerly to his scrutiny of the house, as though my presence marred the sacredness of the vigil. So I walked away and left him standing there in the moonlight—watching over nothing.”

Gatsby’s beliefs about the situation contrast with Nick’s observations. What theme about dreams does this convey?

Dreams can blind us to reality
Dreams can come true if you work hard enough
A dream is a wish your heart makes
Never give up on your dreams.

Dreams can blind us to reality.

The theme about dreams conveyed in this passage is that dreams can blind us to reality. Gatsby, in his obsession with Daisy and his dream of being with her, believes that Tom Buchanan might try to harm Daisy or confront her about the car accident. He waits outside the house all night, convinced that he needs to protect Daisy. However, Nick, the narrator, observes a different reality. He sees Daisy and Tom sitting together in the kitchen, appearing to be conspiring together. This contrast between Gatsby's beliefs and Nick's observations highlights how Gatsby's dream of being with Daisy has blinded him to the reality of her marriage and the true nature of her relationship with Tom. It suggests that dreams can create illusions and prevent us from seeing the truth.

The theme about dreams conveyed in this passage is that dreams can blind us to reality. Gatsby is so fixated on his dream of being with Daisy and recreating their past love that he is blind to the reality of her relationship with Tom. He believes that he needs to protect Daisy from Tom's potential brutality, while Nick observes that Tom is not even thinking about Daisy. Gatsby's belief in his dream causes him to have a distorted perception of the situation, highlighting how dreams can blind us to the truth.