Welcome to Litsy!

"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. [...] The enjoyments of life are sufficient to make it a plesant thing, when they sre taken en passant, without being made a principal object. Ask yourself whether you are happy, and you cease to be so."
-1873