They come and go. Let us shake off our depression. Let us shun pessimism and seek refuge in optimism, which can serve as the best pick me up, if rightly applied. Let the thoughts be noble and sublime. Negative thoughts are the inward enemies.
Positive thoughts lead to a positive personality.
As we think so we are likely to become. We can be a changed person only when we choose to change our thought pattern. To get rid of negative thoughts is to change our destiny. It is due to your thinking - what you are. Either you are in harmony or you are at war.