"Happiness is nothing more than contentedness with one's own being and with one's own way of being, satisfaction with, perfect love of, one's own state, whatever that state may be moreover, and even if it is the most despicable. Now from this definition alone you can understand that happiness is by its nature impossible in a being who loves himself above all else, as all living beings naturally do, the only ones furthermore capable of happiness. A love of self that cannot cease and that has no limits is incompatible with contentedness, with satisfaction. Whatever good a living being may enjoy, he will always desire a greater good, because his own self-love will never cease, and that good, however great it is, will always be limited, and his own self-love cannot have limits. However lovable your state is, you will love yourself more than that state, therefore you will desire a better state. Therefore you will never be content, never in a state of satisfaction with, of perfect love for, your way of being, or perfectly pleased with it. Therefore you will never be and can never be happy, not in this world, nor in another."
January 1, 1970
https://en.wikiquote.org/wiki/Philosophical_pessimism