Shri Mataji Nirmala Devi revolutionized the practice of yoga through the actualisation of self-realization on the central nervous system. In the history of spirituality, Shri Mataji is the first and only person to offer the experience of self-realization en masse. She declared that it is the birthrightof all human beings—regardless of religion, race, nationality, or circumstance—to receive their self-realization. She also insisted that one cannot pay for the truth or for self-knowledge; thus, self-realization has always been, and continues to be, offered free of charge.