Here's some more proof for the benefits of thinking positively. Dr. David Snowden in his book "Age with Grace" reported on a 15-year study of 678 elderly nuns. Dr. Snowden found that having a positive outlook early in life can add as much as 10 years to your life. The nuns who were living longer were doing two key things. One is they accepted negative events as a part of life and two is their attitude was to look forward with confidence to better times. This is not to say you shouldn't have negative emotions; rather it's that you believe the future will bring something positive and better.This means it's never too late to change your thoughts and have a dynamic impact on you body.