Nothing in the world can take the place of persistence.
Talent will not; nothing is more common than unsuccessful men with talent.
Genius will not; unrewarded genius is almost a proverb.
Education will not; the world is full of educated derelicts.
Persistence and determination alone are omnipotent.
It's not over 'til the fat lady sings. In the case of interviews, do not get lulled into thinking that your final "good-bye" is the end of the opera. Far from it.