They who lack talent expect things to happen without effort. They ascribe failure to a lack of inspiration or ability, or to misfortune, rather than to insufficient application. At the core of every true talent there is an awareness of the difficulties inherent in any achievement, and the confidence that by persistence and patience something worthwhile will be realized. Thus talent is a species of vigor.
Eric Hoffer (1982). “Between the Devil and the Dragon: The Best Essays and Aphorisms of Eric Hoffer”, HarperCollins Publishers