I have been trying to fill in the many gaps in my education (how did I miss so much?) and am reading some of the great Russian authors. I came across this in “Anna Karenina”:
Vronsky (Anna's lover) meanwhile, in spite of the complete fulfilment of what he had so long desired, was not completely happy. He soon felt that the realization of his longing gave him only one grain of the mountain of bliss he had anticipated. That realization showed him the eternal error men make by imagining that happiness consists in the gratification of their wishes.
Tolstoy was a wise man.