Definition of Sadhu:
A Sadhu is a Hindu ascetic or monk who follows the path of penance and austerity to gain enlightenment and happiness.
The Sadhu is the fourth phase of life in the Hindu religion, after studying, being a father and being a pilgrim. The Sadhu consists of renouncing all the ties that bind you to the earthly or material in the search for the true values of life. A Sadhu may live included in society, but he tries to ignore human pleasures and pains.