Who said "Dullness is the coming of age of seriousness."?

This quote is attributed to Oscar Wilde.

Dullness is the coming of age of seriousness. - Oscar Wilde

"Dullness is the coming of age of seriousness."

Oscar Wilde Humor

Playwright Poet Irish 1854–1900

"Be yourself; everyone else is already taken."

"The only way to deal with an unfree world is to become so absolutely free that very existence is an act of rebellion."

"I can resist everything except temptation."

"The truth is rarely pure and never simple."

"Never underestimate the power of a good laugh."

"Laughter is the best medicine."

"A good laugh is the best medicine."

"Laughter is contagious and wonderful."