idealistic and impractical; having wildly unrealistic ideals and aims
He came to India with the quixotic determination to vaccinate all the stray dogs against rabies.
quixotic== quick + exotic, if you desire something exotic to happen quickly in your life it is just a daydream. THIS WORD IS DERIVED FROM THE NOVEL 'Don Quixote de la Mancha' in which the HERO, Cervantes GETS inspired by lofty and chivalrous but impractical ideals. So QUIXOTE (QUIXOTIC) MEANS HAVING IMPRACTICAL IDEAS.