Theta Healing technique is a form of energy healing technique which is based on the premise that our current reality is based on our beliefs. Accordingly, in order to change our reality we need to change the underlying beliefs. These beliefs are changed with the help of theta healing techniques.
Without getting in to the nitty gritty of the techniques, essentially the theta practitioner gets in to a meditative state of mind and connects with God / Creator / Divine Light. The Creator then does what is in the client's best and highest good.