When the mind is sick, the whole body is sick because it the engine of the body. A faulty mindset will affect the whole body system. So to be healthy, the mind will be tuned into a healthy state. for as a man thinketh in his heart so he is. We must always adjust our mind to a positive state even when we are upset by anything. We should not allow anger, depression, bad thoughts, negative emotions to dominate our minds for if they dominate, they will quickly manifest in our bodies thereby causing unhealthy feelings.
Some sickness last in the body because they are emotionally induced. That is to say that our emotions hold them up and give them weight so that they occupy high position in our body and from there begin to launch out their attack, causing deterioration in our good feelings and healthy living.
Since faith cometh by hearing, what we believe will one day become a reality. This is because we hold the picture of what we believe, trusting that it will manifest. So it is better to believe in the positive things and discard negative things.
If a doctor tells a pregnant woman that she may not be able to have a normal delivery and the woman believes, the fear of what she has heard will make her not to even try normal delivery. But there has been some cases where doctors said that and the pregnant woman rejects the report and believes she can deliver normal and eventually delivers safely. So it is our state of mind that makes or mars us.
When a sick person believes that sickness is normal part of life and that it comes and goes, this belief will go a long way to revive him faster than he expected, because in his mind the sickness has expiry date which it will not exceed. In a situation where the person gives room for the sickness to nurture itself and occupy large space in the person by what comes in and goes out of his mind, the sickness will be comfortable and stay.
In your mind always be positive about everything and give no room for negative thinking and action.