Innate Heat

Every soul in the universe wants to be healthy and this thought keeps him on the path to health and whether he is a human being or an animal, bird or insect, his nature compels him to stay energetic wherever he gets sick, his nature, It keeps the nature restless until it recovers. This nature has filled some colors in every nature and these colors are called "temperament". Recognition of this mood and a moderate diet according to it is the key to staying healthy. There is a secret. Health is called physical heat or let's call it physical life. When physical heat is lacking, life begins to travel to death. 
This heat can be kept in moderation by exercise and moderate food.