Once in a village lived an old man who used to complain about everything. He thought of himself as one of the most unfortunate people in the world. He always stayed gloomy and in bad mood. Whole village was tired of him. With passing years he became more bile and used to utter more bitter words. People were so fed up of him that they avoided him. Even for people who used to be happy found it insulting to be happy next to him. Just his presence created the feeling of unhappiness in others. But one day, an incredible thing happened. Everyone heard a rumor about old man. Rumor was - old man is happy today. He is not complaining about anything. He is smiling and he seems relaxed. That day, some people from village went to old man and asked, "What happened to you?"Old man replied, "Nothing. for all my life I have been chasing happiness but it was useless. today I decided to live without thinking about wanting happiness and just enjoy life. that's why am happy." 
Happiness will come to you if you stop worrying about it. 