Positive thinking is frankly, what makes people keep living. Positive thinking is a reinforcment in which people can use to try to think about what good things are in their life, and how they can make things even better for themselves. Negative thinking, is what causes depression, suicide, and just sadness. Both of these mind sets are contagious, but you can choose for yourself which one you'll catch. I know people in wheelchairs that have more happiness then superstars because they think of what they DO have, not what they don't. Keep thinking positive, and help the world keep spinning.
