Life suddenly became fiery-coloured to him.
It seemed to him that he had been walking in fire.

Why had he not known it?
With his subtle smile, Lord Henry watched him.

He knew the precise psychological moment when to say nothing.

He felt intensely interested.

He was amazed at the sudden impression that his words had produced, and, remembering a book that he had read when he was sixteen, a book which had revealed to him much that he had not known before, he wondered whether Dorian Gray was passing through a similar experience.
He had merely shot an arrow into the air.