I love Sibyl Vane. I want to place her on a pedestal of gold and to see the world worship the woman who is mine. What is marriage? An irrevocable vow. You mock at it for that. Ah! don’t mock. It is an irrevocable vow that I want to take. Her trust makes me faithful, her belief makes me good. When I am with her, I regret all that you have taught me. I become different from what you have known me to be. I am changed, and the mere touch of Sibyl Vane’s hand makes me forget you and all your wrong, fascinating, poisonous, delightful theories.

– Oscar Wilde

The Picture of Dorian Gray, Chapter 6. The love-sick Dorian makes this response to Lord Henry’s teasing him about agreeing to marriage to Sibyl. Lord Henry is a surrogate for the Devil in the way he influences Dorian towards evil. But Sibyl is the very opposite, a magnet for good against the "poisonous" ideas of Henry on hedonism, whom Dorian confesses he still finds fascinating. Dorian feels that he is being pulled in two different directions in this crucial battle between good and evil, Sibyl vs Henry. At this point Dorian has not given in completely to the dark side, and still holds onto something of his purity and innocence, but it is sadly diminishing. He is at a critical turning point, and realizes it. Which way will he go?