"So you've got a problem? That's good! Why? Because repeated victories over your problems are the rungs on your ladder of success. With each victory you grow in wisdom, stature, and experience. You become a better, bigger, more successful person each time you meet a problem and tackle and conquer it with a positive mental attitude. Stop and think for a moment. Do you know of a single instance where any real achievement was made in your life, or in the life of any person in history, that was not due to a problem with which the individual was faced? Everyone has problems. This is because you and everything in the universe are in a constant process of change. Change is an inexorable natural law. What is important to you is that your success or failure to meet the challenges of change are dependent upon your mental attitude."
A Help-Your-Self Booklet, 1960