“Because you are alive, everything is possible.”
Even in cases where there has been fairly severe physical damage to the brain, research now indicates that new neural pathways can be created. With proper stimulation, undamaged neurons can even sprout new nerve endings. Certain functions can even be transferred from a severely damaged hemisphere of the brain to the other! Faculties and behaviors can be restored. Healing can happen.
To wit: I had a violent temper. I was raised in a household where angry outbursts occurred often. Like my father and older brother, I could readily fly into a rage and lash out verbally-- or physically. My younger brother and I fought often. Even though I was inspired by the teachings of Dr Martin Luther King as a high school student, non-violence was only an aspiration. I struggled with anger into adulthood.