Being healthy means that you are functioning as you were intended to function, resulting in feeling energetic and capable of performing a wide variety of activities. But achieving that goal can be a challenge due to outside forces and your own destructive attitudes.
Health comprises of mental and physical factors.
Being physically healthy means that your body is functioning as it should, without pain, discomfort, or lack of capabilities. Causes of ill-health include injuries, disease, diet, stress and genetics. Also, poor cleanliness habits can result in illness or skin ailments.
Being emotionally or mentally healthy means that your mind and emotions are functioning as they should, without anxiety, depression or other malfunctions. Causes of mental ill health include physical disease, stress, genetics and mental abuse. For example, being constantly and unfairly criticized can affect your emotional well-being. Also, sometimes depression is caused by chemical changes in your body.
In summary the benefits of being healthy are that the above examples of bad physical and mental health do not become part of you life, leaving you a balanced and a happy individual who loves living!