The discovery that the brain can develop new neurons and connections, in others words can grow and change, depending on mental experience, is an exciting discovery. It has wonderful implications for the treatment of mental health issues such as depression and anxiety as well as a range of other possibilities. However, Norman Doidge author of The Brain that Changes Itself , warns that neuroplasticity is neither good or bad, and that the dark side means that if the brain is continuously exposed to negative mental experiences, it will adapt towards those experiences and entrench those habits and thoughts that can use to suffer.