A Positive Mental attitude is the right mental attitude. What is the right mental attitude? It is most often comprised of the "plus" characteristics symbolized by such words as faith, integrity, hope, optimism, courage, initiative, generosity, tolerance, tact, kindness and good common sense. A person with positive mental attitude aims for high goals and constantly strives to achieve them.

Napoleon Hill and W. Clemont Stone
Success Through a Positive Mental Attitude
pp. 13-14