J. K. Rowling said that magic isn't necessary to change the world, because "we carry all the power we need inside ourselves already." According to Walt Disney, we can all realize our dreams "if we have the courage to pursue them." Eleanor Roosevelt noted the importance of believing in one's aspirations, in saying that "the future belongs to those who believe in the beauty of their dreams."
Because she's the British novelist who created the Harry Potter fantasy series, it's appropriate that Rowling used the words "magic" and "power" in a statement about the ability to accomplish great things. Interestingly, the writer's own life story is one of rags to riches, as she managed to achieve multimillionaire status from having lived on state benefits within a period of only five years.
Walt Disney was a 20th-century American entrepreneur, voice actor, film producer, cartoonist and animator. It is noteworthy that he mentioned courage as essential for success, as the seeming turbulence of his career implies the necessity for that attribute. Disney saw the opening and closing of his joint commercial artists company as well as a cartoon studio, the second of which, debt-ridden, went bankrupt.
Eleanor Roosevelt, who became first lady in 1933, not only managed domestic concerns, but was heavily involved in American politics.