It might seem surprising to see an economist write an article with this title, but it was in the New York Times a few days ago by Robert Frank which you can read here. One thing he says is
"Self-interest is surely an important human motive, perhaps even the most important motive much of the time. But it is never the only important motive."
Another famous economist, Frank Knight, wrote in 1934:
"Life is at bottom an exploration in the field of values, an attempt to discover values, rather than on the basis of knowledge of them to produce and enjoy them to the greatest possible extent. We strive to 'know ourselves,' to find our real wants, more than to get what we want."