The rational and emotional parts of our brain have a similar relationship to that of a soldier and his commander. We will pretend that your emotional mind, like a soldier, has been drafted into a war. Instead of fighting people, you are fighting thoughts and perceptions. The commanding part of your brain is rational, and unmoved by emotional influence. The commander makes decisions that they are certain of. The commander knows what has to be done. The soldier has the arduous part. The soldier is in the trenches. The soldier must be diligent, strong and well trained. Without these attributes the soldier will likely fail the task. The soldier has no choice, they are forced to do whatever the commander says.
That being said, separate the decision making part of your brain with the emotional side. Humans find strife with acting on impulse and emotion. Rightfully so, it is in our DNA. But what if you did not have to act on impulse, since you have to follow orders from your superior, aka your rational brain. For example, quitting nicotine, coffee or sugar. We find every excuse in the book to get around our deep premeditated desires. When your brain is firing the way it does during cravings it can feel impossible to resist. What would happen if you already had orders. Instead of running into this battle blindly, let the rational brain devise a plan. Your rational brain is a brilliantly astute strategist. The emotional brain is not. The emotional brain struggles with long term, frequently taking the easier route. Make a plan, put your head down and follow orders. No feeling is permanent. Your rational brain is your best brain, listen to it, listen to yourself.