Positive thinking plays a very vital role in our lives. We have no idea about the importance of this fact that what we think and what we say, I mean "the thoughts and the words become your destiny sometimes". So positive thinking is something that keeps you alive in a very depressing situation,if you are in a state where you have no way out you can only think positive and stay calm and just meditate try to connect your inner self with the divine source, the source of light the source of escape from worries and the source which heals you.So to reach that divine source you need to imagine and think positive this will heal you.If you try this with all your heart and focus on positivity you will heal your relationships also.Posivity is self improvement, meditation a source of enlightment.