Quality of thoughts determines the level of peace of mind. Negative thoughts result in negative acts which in turn causes distraction in emotions, unstable behavior, frequent mood swings, family complications, lack of trustworthiness, financial mistakes, professional brawls and so on. Healthy thoughts result in more positive outcomes, high happiness index, better health and so on. So all in all your thoughts are defining your present and your future.
There are several reasons for negative thoughts including but not limited to your circumstances, your brought up, financial situations, family conflicts, job and family complications. While you may not be able to fix these reasons, it is highly recommended to analyze your thoughts and mitigate the negative impact as much as possible. If you remove the impurities from your thoughts you would be able to have a positive, focused and prosperous mind.
How Can I Improve the standard of my Thoughts:
a) Avoid thinking about unnecessary things specially related to others. Mind your own business. Posses a focused mind.
b) Stop comparing yourself to others. It's an insult to yourself. You are a unique soul and you are independent on your living, your decisions and your destiny.
c) Don't think of monetary gains too much. Excessive love for money and assets is the root of most of stresses. Work on your real wealth.
d) Develop the habit of forgiving and letting things go off. If you are keeping the grudge in your brains for longer durations, you are killing yourself. Stress is a slow poison which deepens its roots your brain and destroy your physical and mental health.
e) Read quality quotes or articles on positivity and try to absorb the message. This will kill the germs of negativity.