From 1922. No byline.
“You are thirty-five years old,” I said to myself. “More than half of your life has already been spent. Who is living your life, anyway? Is it actually yours? Or is it a kind of public storehouse of odd jobs? A pile of days and hours put on the counter of the world with a sign inviting every Tom, Dick, and Harry to take one?”
It was in that solemn morning hour, as I have said, that I formally retired from the business of being Everybody’s Friend. For weeks I had to school myself in the hard business of saying “No.” But five years have made the cure almost complete.
tl:dr: Nice guys finish last because they look for approval from everyone (which in itself is manipulative) except themselves.