The world always encounters several social, technological, spiritual and political upheavals in the history of human liberation. Great men contributed for the enrichment of human culture and liberation through their teachings and exemplary lives. Many great people lived on earth, realized the Truth, lived in solitary bliss, and never felt compelled to transfer their wisdom to the contemporary society. They were saints of one kind. There is another kind of people that realized the Truth, got liberated from ignorance, and found the way for a happy and peaceful life; they lived accordingly, founded organizations and through that made every effort to transfer their wisdom to their contemporary society. Vethathiri Maharishi belongs to the second kind. He expounded and examined various tenets of Advaita philosophy. The main contents of his philosophy include social philosophy, metaphysics, cosmology, world, nature, and yoga and meditation. In order to expound all his perceptions he hasbecome a prolific writer and good orator. He wrote nearly seventy books.