How would you like to live?
Say you see someone you love – the brain chemistry includes wonderful things like dopamine, a pleasure chemical, or vasopressin, which makes you feel attractive, plus growth hormones. When people fall in love they feel happier, more beautiful, full of life, because of what the brain releases. Whereas if a person sees something that scares them, the brain releases stress hormones and inflammatory agents. Those make the cells stop growing and eventually die.
It’s mind-body. Epigenetics doesn’t change the genetic code, it changes how that’s read. Perfectly normal genes can result in cancer or death. Vice-versa, in the right environment, mutant genes won’t be expressed. Genes are equivalent to blueprints, epigenetics is the contractor. They change the assembly, the structure.