Oscar Wilde,
The Picture of Dorian Gray — Chapter 6
(1891)
“ When we are happy, we are always good, but when we are good, we are not always happy.""Ah! but what do you mean by good?" cried Basil Hallward."Yes," echoed Dorian, leaning back in his chair and looking at Lord Henry over the heavy clusters of purple-lipped irises that stood in the centre of the table, "what do you mean by good, Harry?""To be good is to be in harmony with one's self," he replied, touching the thin stem of his glass with his pale, fine-pointed fingers. Discord is to be forced to be in harmony with others. One's own life – that is the important thing. ”
