Deadly Emotions
I read this book a while back and it's an extremely eye-opening book. Some physical conditions are a result of emotions like anger, bitterness, and unforgiveness.
Think about it... We all have the potential to get cancer, heart disease, high blood pressure, etc., however it takes an enormous amount of stress to allow it to take over our body. There are many cases where when you choose to forgive you actually become instantly better. It's amazing the toll that stress has on the body and the damage it can cause.