Ayurveda is the science of life, which deals with Sukha Ayu, Dukkha Ayu, Hita Ayu, Ahita Ayu. Ayurveda deals with the ways and means to achieve health and also the path, which leads to disease. It also deals with quantum of the Ayu (life).

Ayurveda is made from two words : Ayu and Veda . Ayu means life and Veda means knowledge or science. So the literal meaning of the word Ayurveda is the Science of life of Knowledge of Life.

Classification of Ayu (life) according to Charak:

1. Sukha Ayu : – Sukha Ayu leads healthy life. The person who has good health is said to be having Sukh Ayu.

2. Dukkha Ayu :- Dukkha Ayu leads diseased life. The person who has bad health is said to have Dukkha Ayu.

3. Hita Ayu :- Hit Ayu leads its life to serve the society.

4. Ahita Ayu :- It leads its life in destructive activities.

Life is a great combination of sense , mind ,body and soul. Modern Medical Science is treat only Physical symptoms when Ayurveda also provides comprehensive knowledge about spiritual , mental and emotional health. Ayurveda is based on a theory of balance.
When there is a balance between the body and the soul ( Spiritual ) and mind (psychological) complete health is enjoyed.