Among the six schools of philosophy, a prominent school which advocates ritualistic sacrifices and karma for the freedom of the soul is called Purva Mimamsa or Karma Mimamsa. Nyaya, Vaiseshika, Sankhya, Yoga, Mimamsa or Purva Mimamsa and Vedanta are the six schools of philosophy. Purva Mimamsa is the system of the study of the Veda Samhitas, discovering the true meaning of the mantras of the Samhitas and their application in sacrificial deeds as expounded in the ritualistic portion of the Vedas known as the Brahmanas. Brahma Sutra points out the inadequacy of sacrificial rituals as means to ultimate freedom, Moksha. Action is a process, and process is not an immutable reality.
Action has a beginning, and so it has an end.
Action, Karma, or Sacrifice is perishable, and the perishable cannot lead to Moksha. Action is a purification process. The satisfaction of the gods is the purpose. If the gods are satisfied, we shall also be satisfied. By yajna .