Your power lies in that you can assert control over your thinking patterns. There are much more negative thinking people in the world, so if you find yourself on the negative thought plane, it is easy to get caught up in the line of thoughts that are constantly being sent out and received on that plane, just like radio waves.
What you think about is what will manifest. The Law of Attraction is based on the sum of our thoughts. The things you think the most about are the things that will become physical reality around you. Your actions follow the vibrations of your thoughts, as little by little your thoughts transmute to become the energy of feeling, and that feeling is the powerful magnet-like attracting force behind everything that comes to fruition in our lives.