Merriam-Webster's definition of desire is to long or hope for and to express a wish for/to. We naturally, for some reason, want too much either from relationships, jobs, education etc., which often results in disappointments and negative feelings. If we can't get what we want, we become disappointed; however, when we have too much, we grow tired of it resulting in boredom or loneliness. Often, we don't appreciate what we already have; therefore, taking it for granted. Next time you desire something or someone (relationships), ask yourself why you think you want or need it. Eric Fromm, a well known Psychiatrist, argued that man's main task in life is give birth to himself and to become what h/she potentially is. The main reason for people's sadness is probably reaching the end of the line and realizing that they have not reached their potential, living the rest of their lives in regret.