Who said "The man who makes no enemies is the man who makes nothing."?

This quote is attributed to O. Henry.

The man who makes no enemies is the man who makes nothing. - O. Henry

"The man who makes no enemies is the man who makes nothing."

O. Henry Leadership

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."

"A leader must be fair and just."

"Integrity is everything."

"One must take responsibility for one's environment."

"In this house, I make the decisions"