New Delhi, Nov. 27 -- Prime Minister Narendra Modi on Wednesday hailed the Constitution as a "sacred document" that guided the country's progress and said every action should strengthen the document and further national goals and interests. He also said it was the Constitution that had given several others, like him, the "power to dream and the strength to work towards it". In a letter to the nation on the occasion of Samvidhan Diwas or Constitution Day, the PM said it is our responsibility to fulfil the dreams envisioned by the framers of our Constitution. "When we work with this sense of duty, our nation's social and economic progress will multiply manifold." he wrote. Modi said it was the power of the Constitution that enabled a person l...