Who said "The secret source of humor is not joy but sorrow."?

This quote is attributed to Horace.

The secret source of humor is not joy but sorrow. - Horace

"The secret source of humor is not joy but sorrow."

Horace Humor

Poet Ancient Rome 65–8

"Carpe diem, quam minimum credula postero."

"Seize the day, put no trust in the morrow."

"I have often regretted my speech, never my silence."

"Life gives nothing to mortals without hard work."

"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."