This is a famous quote by Wilde. The specific situation is:

Oscar Wilde (Oscar Wilde): British art, playwright, and advocate of the British aestheticism art movement. Born in Dublin, Ireland on October 16, 1854 and died on November 30, 1900. Graduated from Trinity College, Dublin, he was a playwright, poet, essayist, and a British talent as famous as Bernard Shaw in the 19th century. His representative works of drama, poetry, and novels: the novel "The Picture of Dorian Gray"; and the most famous shocking work "Prison Story". He left many idioms to future generations, such as: Living happily is the best revenge.