" The only thing unqualifiedly good in this world is a good will - the will to follow the moral law, regardless of profit or loss for ourselves.

Never mind your happiness; do your duty.

"Morality is not properly the doctrine of how we may make ourselves happy, but how we may make ourselves worthy of happiness."

Let us seek the happiness in others; but for ourselves, perfection - whether it bring us happiness or pain. "

― Will Durant , The Story of Philosophy: The Lives and Opinions of the World's Greatest Philosophers