IFS (Internal Family Systems) is an evidence-based psychotherapy model. It is safe and effective for many kinds of mental and physical challenges. Please note that this is a very brief explanation of the IFS model.
IFS recognizes that we are all made up of a system of various sub-personalities or parts, and these parts have their own feelings, thinking, fears and actions. Though all parts are well intentioned, their current methods can sometimes be counterproductive and may be rooted in past traumatic experiences.
Besides these protective parts we also have a Self which is sometimes referred to as the soul or higher consciousness in other traditions. When the Self is present enough within the system it is characterized by its calming, compassionate and curious nature, which leads to natural healing.