Reacting to JD(U) Chief Nitish Kumar taking oath as Bihar Chief Minister in alliance with NDA on Sunday, NCP Chief Sharad Pawar said that the public would teach him a lesson in the future. "Whatever happened in Patna, such a situation was never seen before in such a short period...I remember it was Nitish Kumar who had called all the non-BJP parties to Patna...His role was also similar but what happened in the last 10-15 days that he left this ideology and today he joined BJP and formed the government...In the last 10 days, it did not seem that he would take such a step. On the contrary, he was playing a role against BJP. Don't know what happened suddenly, but the public will definitely teach him a lesson for his role in the future...," said Mr Pawar.