The excerpt that best highlights the elation Edna feels when she thinks of Robert is:
"The morning was full of sunlight and hope. Edna could see before her no denial—only the promise of excessive joy. She lay in bed awake, with bright eyes full of speculation. 'He loves you, poor fool.'"
This passage captures Edna's elevated emotions and optimistic thoughts about her connection with Robert, reflecting her sense of joy and anticipation.