Author Dawson Church applies the insights of the new field of Epigenetics (epi=above, i.e. control above the level of the gene) to healing. Citing hundreds of scientific studies, he shows how beliefs and emotions can trigger the expression of DNA strands. He focuses on a class of genes called Immediate Early Genes or IEGs. These genes turn on within a few seconds of a stimulus. They can be triggered by thoughts or emotions ('I loved that unexpected gift of roses Bill gave me' or 'I'm so mad about what Uncle John said at the Christmas party'). Many IEGs are regulatory genes turn on other genes that affect specific aspects of our immune system, such as the production of white blood cells that destroy attacking bacteria and viruses. Epigenetics thus influences our health every day. He coins the new term 'Epigenetic Medicine' to describe healing techniques with epigenetic effects. He also summarises the science behind the infant fields of Energy Psychology and Energy Medicine, both of which offer promising epigenetic medical therapies.