Rudra mantras from Taittiriya Samhita are given to the mankind by the great rishis for manifesting the power of healing and the upward evolution of the consciousness. There are many books giving the text and meaning of Namaka hymn. Our book is different from them in several significant ways. The focus here is not on the mere chanting of the mantra, but on the practice of inner yajna, the yajna which is occurring in our subtle bodies. The recitation of the Namaka and the Chamaka hymns is a part of this practice.