An eminent psychologist, Joseph Kreisler, recognized the importance of contentment from having observed problems of human nature from a professional viewpoint.  Dr. Kreisler says, "If you wish to be miserable, think about yourself and what you want, what you like, what attention other people ought to pay you, and then you will find nothing will satisfy you.  You will spoil everything you touch, and finally, you will make pain and misery out of everything God sent you."