There was once a statement made by a psychologist that said that 80 percent of the pursuit of happiness is really just about the genes, and it's as difficult to become happier as it is to become taller. That's nonsense. There is a decent contribution to happiness from the genes — about 50 percent — but there is still that 50 percent that is unaccounted for.
Una vez, un psicólogo declaró que el 80% de la búsqueda de la felicidad depende únicamente de los genes, y que hacerse más feliz es tan difícil como hacerse más alto. Es una tontería. Los genes contribuyen bastante a la felicidad - alrededor del 50% - pero queda un 50% que no se explica.