Who said "What is past is prologue."?

This quote is attributed to Dorian Gray.

What is past is prologue. - Dorian Gray

"What is past is prologue."

Dorian Gray

Character in The Picture of Dorian Gray

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"I wish I could love as you love."

"I don't want to be at the mercy of my emotions."

"I suppose I should be flattered."

"There ought to be some compensation for that."