"""His bedroom was the simplest room of all-except where the dresser was garnished with a toilet set of pure dull gold. Daisy took the brush with...""

There is a
strong connection between the green light at the end of the dock and this passage. The moment of
extreme delight asexamines his bedroom represents the high point of the overwhelming
joyexperiences at finally achieving his five-year-long dream of reuniting with Daisy. He shades
his eyes because, asexplains, he has been running at "an inconceivable pitch of
intensity." Daisy is like a brilliant sun to him, and he needs to shade himself from the
reality of her presence, which is suddenly so close.

But this is the high
point. As Nick explains,

in the reaction, he was running
down like an overwound clock.

A little while later,
having shown Daisy the house, Gatsby and Daisy, with Nick tagging along, tour the grounds.
Gatsby mentions to Daisy that if the mist weren't there, they would be able to see the green
light at the end of her dock. Nick understands the poignance of the moment. He states, in a
famous passage,

Possibly it had occurred to him that the
colossal significance of that light had now vanished forever. Compared to the great distance
that had separated him from Daisy it had seemed very near to her, almost touching her. It had
seemed as close as a star to the moon. Now it was again a green light on a dock. His count of
enchanted objects had diminished by one.

What Nick
understands is that achieving our dreams inevitably tarnishes them. A reality, no matter how
wonderful it is, can't match our imagined dream of it. Now that Gatsby has Daisy back in his
life, she will inevitably became more real and less enchanted. She is no longer the longed-for
green light at the end of the dock, but a real person. The high point of a dream, Nick is
saying, comes the moment we realize iteverything else is downhill.