In your system of reality you are learning what mental energy is, and how to use it. You do this by constantly transforming your thought and emotions into physical form. You are supposed to get a clear picture of your inner development by perceiving the exterior environment. What seems to be a perception, an objective concrete event independent from you, is instead the materialization of your own inner emotions, energy, and mental environment.
Be careful what you ask for because when you pray for rain, you have to deal with the mud as well.