Wednesday's Words of Wisdom

I can't believe I haven't yet posted something by the quintessential Renaissance Man, Leonardo Da Vinci (1452-1519). So, to rectify that situation, here's a quote that ought to serve as a general motto for all of us:

"Iron rusts from disuse, stagnant water loses
its purity, and in cold, weather becomes frozen;
even so does inaction sap the vigors of the mind."