In the ending the king is a powerful piece for assisting his own pawns, or stopping the adverse pawns.
Wilhelm SteinitzNo great player blundered oftener than I done. I was champion of the world for twenty-eight years because I was twenty years ahead of my time. I played on certain principles, which neither Zukertort nor anyone else of his time understood. The players of today, such as Lasker, Tarrasch, Pillsbury, Schlechter and others have adopted my principles, and as is only natural, they have improved upon what I began, and that is the whole secret of the matter.
Wilhelm Steinitz