<This post is not complete. It is placed here to test the blog space. >
Be happy but never satisfied.
You may have heard that in order to be happy you should learn to with content with what you are or have. And that you should be satisfied with yourself. Now this may be a noteworthy perspective but it is certainly not a good thing for your development.
Think of it this way. If you are satisfied, then they would be no drive for you to improve. You will just be happy with your old self regardless where you are and what you have become. This can be a sell fallacy and eventually there will be nothing to be happy about.