Irons rusts from disuse, stagnant water loses its purity and in cold weather becomes frozen; even so does inaction sap the vigor of the mind. – Leonardo da Vinci, Notebooks, 1508
Men can live without air a few minutes, without water for about two weeks, without food for about two months — and without a new thought for years on end. – Kent Ruth
Television has a real problem. They have no page two. Consequently every big story gets the same play and comes across to the viewer as a really big, scary one. – Art Buchwald, 1969
