François VI, Duc de La Rochefoucauld, Prince de Marcillac was a noted French author of maxims and memoirs. It is said that his world-view was clear-eyed and urbane, and that he neither condemned human conduct nor sentimentally celebrated it. source
The attributes for entrepreneurs cut both ways. You need the ability to ignore inconvenient facts and see the world as it should be and not as it is. This inspires people to take huge leaps of faith. But this blindness to facts can be a liability too. The characteristics that help entrepreneurs succeed can also lead to their failure.