Depending on our moods, so will be our whole body, many people live sick, more for their moods, than for their physical health, there is nothing stronger that makes us sick as our negative attitude.
If we keep our mood strengthened, our whole body will be in the same way, positive thinking is the best medicine to combat all evil that wants to grab us, at least, that's how I feel when I do not let myself get sick with negative thoughts, and anyone who lets himself be invaded with these thoughts will surely lose a lot.
We all have our own point of view and it is debatable, however, I have found that keeping a positive attitude helps a lot to avoid falling into a state of mind that works against us.
Joy is a product of keeping positive thoughts, and the key to not getting sick easily, one of the main causes of health deterioration is the negativity that we can develop.
This medicine is totally free and it is in our hand to get it, someone could try to contaminate us with attitudes of pessimism, but the dose against this evil we have at our disposal, with positive thoughts all the time, this generates joy and happiness.