Quotes from John Stewart Mill

But these few are the salt of the earth; without them, human life would become a stagnant pool. Not only is it they who introduce good things which did not before exist, it is they who keep the life in those which already existed.

Those only are happy who have their minds fixed on some object other than their own happiness: On the happiness of others, on the improvement of mankind, even on some art or pursuit, followed not as a means, but as itself, an ideal end. Aiming thus, at something else, they find happiness, by the way.