The Brain: Friend or Foe?

How does one undo the flipping of a switch in the brain, the turning on of a light bulb, or a u-turn of the heart? I would say this first requires an understanding of these triggers and their causes, but I can't claim that to be true because I have personally never been successful in it. Thoughts and feelings that were dormant or in hibernation are no longer. Our minds are so stubborn and rebellious in their ways. Mysterious and explosive. Once this is acknowledged you can feel your brain at work behind your back. Firing little messages in the form of electrical currents to neurons amongst itself with complete disregard to my mental stability and discontent. I'll solve this mystery of the brain and finally understand what it means to be human.