Gnana Oli (English: Light of Knowledge) is a 1972 Tamil language drama film directed by P. Madhavan, written by Vietnam Veedu Sundaram, starring Sivaji Ganesan in the lead role. This film was remade in Hindi as Devata (1978) and in Telugu as Chakravarthy (1987).
An Orphan struck by poverty works hard to make a living for his daughter. He accidentally kills a person . He leaves his daughter and village behind, and returns after a very long time as a rich businessman with a different identity. He is faced with a dilemma whether or not he will disclose his identity to protect the dignity of his daughter.
Sivaji Ganesan as Anthony
Major Sundarrajan as Lawrence
V. K. Ramasamy as Doctor
M. R. R. Vasu
Sreekanth in Guest Appearance
Vijaya Nirmala in Guest Appearance
Manorama as Doctor's wife
I.S.R as local politician (MRR Vasu's friend)
The music composed by M. S. Viswanathan.
1973 - Filmfare Best Actor Award (Tamil) for Sivaji Ganesan