As a thought wave is sent out, it interacts with the wave patterns of the person or activity it is directed at. When waves meet they can be added or subtracted depending on if the wave pattern is positive or negative. We can therefore get a superimposed wave , positive or negative. It doesn't stop there, as energy cannot be destroyed. We have the power, we have been given the power to influence the existence of All That Is.
Waves have certain characteristics.
Since you have interfered with the wave patterns of a particular nature, the result will be the creation of a wave form or energy packet in response to that. You therefore create not only your own destiny, but in the process of sending out and receiving energy waves, build a template for who and what you are. You are what your thoughts are. If you are surrounded with positive things like Love and Light, you will become that Love and Light. When a person receives too much or chooses to be surrounded by negative energy waves, the spirit starts vibrating at a lower frequency than is intended.