In addition to all these physiological benefits, and likely as a result of them, it seems that smiling may also be a significant predictor of life expectancy. In a 2010 study out of Wayne State University, researchers found that by looking at the intensity of smiles in old photographs, they were able to correlate our facial expressions with longevity. People that had bigger smiles were more likely to have lived to a greater age!
Here is a definition of both success and happiness that seems to resonate with something deep inside the human spirit. So many times it seems success and happiness defy definition, but really you’d have to say you’re successful if you’re getting what you want. So many people get what they want but aren’t happy, which means that when they got what they want they found out it wasn’t enough, or wasn’t what they thought it would be. Be successful and happy by wanting what you get, and getting what you want.

We are so often hit with negativity—negative news, negative perspectives—from pessimistic people that it might seem next to impossible to continue on with a positive spirit. Instead of getting stuck in the negativity, turn to those habitually optimistic people who have figured out how to see the brighter side of life and remain positive no matter what… so you can learn to do the same.
10.) “A friend is a person with whom I may be sincere. Before him I may think aloud. I am arrived at last in the presence of a man so real and equal, that I may drop even those undermost garments of dissimulation, courtesy, and second thought, which men never put off, and may deal with him with the simplicity and wholeness with which one chemical atom meets another.”