No great hero ever became a hero without a more than a little perseverance. Despite all the barriers in Perseus' way, still he bravely trudges forward. Even though the task of delivering Medusa's head to his king seems impossible, he never quits. In a way, he was like the Jack Bauer of the ancient world. He gets the job done no matter what it takes. Perseverance is one of those qualities that everybody seems to admire. We're guessing that's why so many of our heroes, real and imaginary, have it in spades.