One of my colleagues tells a story about how he used to hang out with some of the people from his department. At first, he enjoyed their company, but as they came to know each other better, he found them to be extremely negative and even angry. All they did was complain about their job and gossip about their co-workers. Now, even though my colleague is an upbeat, intelligent person, he would go back to his office down about his work, his company, and even life. He let their negativity affect him without even realizing it.
So think about the value of positivity, and then think of how positivity can affect your world.