Kochi: Interacting with students at St. Teresa’s College for women, an autonomous institution here, the 50-year-old Congress leader (Shri Rahul Gandhi) displayed some skills useful for the women for self-defence.He taught them a ‘Principle’ from a martial art which they can use to protect themselves. After imparting the lesson to the girl students by staging a demo involving them, Shri Gandhi told them about the need to gather inner strength while being pushed by the society.