Who said "What is it that people always want more of?"?

This quote is attributed to O. Henry.

What is it that people always want more of? - O. Henry

"What is it that people always want more of?"

O. Henry

Writer American 1862–1910

"Turn up the lights. I don't know what time it is."

"We are not made by our circumstances, we are made by our choices."

"Life is made up of sobs, sniffles, and smiles, with sniffles predominating."

"A stitch in time may have ten times the sequel."