On the average, a person who cares for other people, for his country, or for mankind, is a happier man than one who does not
 John Stuart Mill, Considerations on Representative Government (1861). copy citation

Context

“He has no pleasure in their pleasure, and does not care for their affection. His neighbor, who does, is probably a happier man than he; but could he be persuaded of this, the persuasion would, most likely, only still further exasperate his malignity or his irritability. On the average, a person who cares for other people, for his country, or for mankind, is a happier man than one who does not; but of what use is it to preach this doctrine to a man who cares for nothing but his own ease or his own pocket? He can not care for other people if he would. It is like preaching to the worm who crawls on the ground how much better it would be for him if he were an eagle.” source