Chief Justice of India Ranjan Gogoi on Monday underscored the primacy of the Constitution and warned that to preserve democracy and the country's institutions, the constitutional liberties must be safeguarded. "We must observe the caution which (British political economist) John Stuart Mill has given to all who are interested in maintenance of democracy, namely not to lay their liberties at the feet of even a great man. Or to trust him with power which enables him to subvert their institutions," the Chief Justice said at an event to mark Constitution Day on Monday. "There is nothing wrong in being grateful to a great man who has rendered life-long services to the country. But there are limits to gratefulness," he added.