Everyone has heard examples of people using the power of the mind to achieve great feats. People have been cured of disease aided by the power of their mind. The mind has been known to be able to manipulate inanimate objects through telepathy.
Your mind can also be the cause of many illnesses. Most of us think of ulcers and other intestinal problems when we think of stress related maladies. But you mindset can be the catalyst for almost any disease or illness.
Happiness is a choice and your mind is the biggest factor in determining your happiness level. How a person perceives the world around them is based on their thought processes when dealing with issues that arise. We all have problems but there is a huge variance in individual perception of the same occurrences.