"O.K., Wilbur," said Charlotte. "You can go back to sleep. O.K., Templeton, the soap ad will do, I guess. I'm not sure Wilbur's action is exactly radiant, but it's interesting."
"Actually," said Wilbur, "I feel radiant." (13.50-1)
Charlotte had written the word RADIANT, and Wilbur really looked radiant as he stood in the golden sunlight. Ever since the spider had befriended him, he had done his best to live up to his reputation. When Charlotte's web had said SOME PIG, Wilbur had tried hard to look like some pig. When Charlotte's web said TERRIFIC, Wilbur had tried to look terrific. And now that the web said RADIANT, he did everything possible to make himself glow. (15.6)
"That's some pig!" said Mrs. Arable.
"He's terrific," said Lurvy.
"He's very radiant," said Fern, remembering the day he was born. (16.42-4)