I've obviously had some fun deriding intelligence. It is helpful within limits. Knowledge, temperment , emotional maturity can all be more important at the individual level. As an entrepreneur, I value persistence. Hence, my fondness for this quote from silent Cal.
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. The slogan 'Press On' has solved and always will solve the problems of the human race.
Calvin CoolidgeUS politician (1872 - 1933)