Beyond Self-Delusional Positive Thinking
Too much positive thinking can lead to self-delusion. You experience a false sense of growth because you lower your awareness, blinding yourself to your problems instead of truly facing them. As a general rule of personal development, whenever you do something that lowers your awareness instead of raises it, you’re making a mistake.
There are three key components of intelligence as it relates to personal growth: self-trust, awareness, and fearlessness.
http://www.stevepavlina.com/blog/2006/01/beyond-self-delusional-positive-thinking/