It is the ability to put up with 2.5 hours of Barrister Shankar Narayan and still be able to come out of the theatre without abandoning your state of mind.
What is luck?
Luck is the ability to save your eardrums from bleeding, in spite of exposing your ears to 145 minutes of tumultuous screaming.
However, luck will only take you so far, but it is only faith that will take you all the way. It is only faith in humanity (or why would the filmmakers - who are obviously human - allow a fellow human to endure such suffer....