I always tell my patients to keep positive thoughts, be nice, stay in harmony and happy . Dr. Emoto from Japan believed that our emotional and energies can change the physical structure of water from his water crystal experiment. He  claimed that water exposed to positive speech and thoughts would result in visually pretty crystals being formed when that water was frozen, and that negative intention would form “ugly” frozen crystal.
Acutually my daughter who is an undergraduate student in Washington University in St. Louis did a similar experiment last year for her art of medicine class. In her experiment She used different music notes to treat rice in water, in order to see how rice and water response to different type of music, she found if the happy music played, the water  in the jar is clear and the rice stayed in no change, if the loud or sad music played, the water in the jar became unclear and the rice became mold. I personal believe our mind does have more power than modern science gave it credit. Here is the link to you to learn more about it.
http://www.masaru-emoto.net/english/water-crystal.html

©Dr.Li Zhang