Everything in the universe is energy; intangible energy governs tangible matter—this is called "manifestation." Just because something is unseen does not mean it doesn't exist. Meridians are intangible, yet they determine the smooth flow of energy in the body; thoughts are intangible, yet they influence a person's words and actions; magnetic fields are intangible, yet they affect our physical and mental state; feng shui is intangible, yet it influences the course of our lives; kindness is intangible, yet it guides our conduct; temperature is intangible, yet it creates the cycle of the seasons; air is intangible, yet it determines the life and death of all living things; thoughts are intangible, yet they shape a person's destiny; cause and effect are intangible, yet they determine our future circumstances.