An excerpt from The Thousand and One Nights
Shahrazad tells the sultan about Harun al-Rashid
"Shahrazad said, 'It is related that one night Harun al-Rashid felt himself weighed down by a heavy depression. He said to his lieutenant Jafar, 'Brother and Wazir, my heart is heavy.' Jafar replied, 'O King of Time, all joy and sorrow come from within, but sometimes outside shows may have an influence upon these humors. Have you made trial of any outside shows today?'
"The sultan said, 'I have taken up in my fingers and let fall all the jewels of my treasury; the rubies, the emeralds, and the sapphires, but not one of them lifted my soul to pleasure. I have been to my harem and passed in review the white and the brown, the copper colored and the dark, but none of them lifted my soul to gladness. I went to my stables, but not one of my countless horses could amuse me, and the veil of the world has not lifted.'"