Rajyogini Brahma Kumari Dadi Ratan Mohini was born on 25-3-1925, at Hyderabad Sindh. When barely twelve years old, Dadi came in contact with the Brahma Kumaris. Since childhood, she had an inclination for spirituality, thus dedicating her life for godly service and taking a vow to observe celibacy throughout her life. Dadi is of an intellectual bent and from a young age was encouraged by Brahma Baba to study and write about her understanding of BK concepts. A deep thinker and insightful speaker on any spiritual subject, Dadi exemplifies a life of purity, peace and elevated purpose.
In 1950 after fourteen years of solitude and intense meditation, along with all the other students of the vishwa vidyalaya, she came and settled in Mount Abu.
In 1954 Dadi represented the PPBKIVV at the World Peace Conference in Japan. Dadi subsequently travelled in Asia for nearly a year, rendering spiritual services to people in Hong Kong, Singapore and Malaysia. From 1972 to 1974 she played a major role in the establishment of BK centres in the United Kingdom. Since then Dadi has been based in India but has travelled throughout Africa, North and South America and the Caribbean, Europe, Russia and Asia. In India she is known for the large youth marches and rallies which she has organized or guided.