He had known Basil Hallward for months, but the friendship between them had never altered him. Suddenly there had come some one across his life who seemed to have disclosed to him life’s mystery. And, yet, what was there to be afraid of? He was not a schoolboy or a girl. It was absurd to be frightened.

– Oscar Wilde

The Picture of Dorian Gray, Chapter 2. Dorian says that his months long friendship with Basil had never altered him. But all of a sudden he is feeling the strong influence of Lord Henry, someone who has revealed to him "life’s mystery." Dorian appears on the brink of some transformative change and admits that he is frightened.