Are You as Happy as You Make Your Mind Up to Be?

I read the following passage the other day and wondered, “Where did the author get this crazy idea?” and “What’s this wacky idea about resigning yourself to your fate? I disagree.” What do you think? Here it is:

Abe Lincoln once remarked that ‘most folks are about as happy as they make their minds to be’. He was right. I saw a vivid illustration of that truth as I was walking up the stairs of the Long Island Railroad station in New York. Directly in front of me thirty or forty crippled boys on canes and crutches were struggling up the stairs. One boy had to be carried up. I was astonished at their laughter and gaiety. I spoke about it to one of the men in charge of the boys. “Oh yes,” he said, “when a boy realizes that he is going to be a cripple for life, he is shocked at first; but after he gets over the shock, he usually resigns himself to his fate and then becomes as happy as normal boys.” I felt like taking my hat off to those boys. They taught me a lesson I hope I shall never forget.” Dale Carnegie, How to Win Friends and Influence People, 1936. Reissued in 1964.