Why is mental health important to physical health

Why is mental health important to physical health? Your mental health directly affects your physical health vice versa, when you go through something in the mind it directly affects the body as well, eventually these two things start to attack one another like a double-edged sword, the mind controls every single facet of the body so when you think in a negative capacity you are telling the body to destroy itself. Over time as the symptoms of depression start to become more noticeable and develop into full on clinical depression, your behavioral health starts to change, once this happens the mind starts to become incredibly negative, once the mind takes on this negative view of itself you start to develop various different diseases and pain throughout the body. Negativity and negative thoughts destroy the body, just like you can heal yourself with positive thoughts you can destroy yourself with negative thoughts, little by little your telling the body to dismantle itself so various diseases get by your defenses and start to manifest.