Gulzar was interacting with the media at the launch of Bhavani Iyer's debut novel "Anon" on Tuesday in Mumbai.
The #MeToo movement exploded in India after Tanushree Dutta renewed a decade-old complaint of harassment against Nana Patekar two weeks ago.
Commenting on the movement that has gained momentum, Gulzar said: "Cinema is a reflection of the society. If we say harassment of women or a girl is happening only in cinema, then I don't think so. It has spread all over the society. Cinema has yet spared you where sexual harassment cases are still occurring with a 4-year-old girl and an 8-year-old girl and thank God that cinema hasn't put that mirror in front of people.
"But beware, cinema has started reflecting every part of your life."
Gulzar has directed path-breaking films like "Koshish", "Aandhi" and "Maachis" in his career. He was honoured with the Padma Bhushan in 2004.
"It is not only dependent on good old stories. We say we love children and we respect women but are we doing that in our real life? So cinema is still sparing you... Which you have started realising, so let the cinema come in and tell you this is what you are.
"It is not that cinema will teach us good values and morals to carry. Cinema is not meant for that. If you are thinking that cinema is like a Bible which will teach you to be a good human, then you are mistaken."
(With inputs from agencies.)