Rest breeds rust. – Proverb

What is this life if, full of care, we have no time to stand and stare? – William H. Davies

It is already possible to imagine a society in which the majority of the population, that is to say, its laborers, will have almost as much leisure as in earlier times was enjoyed by the aristocracy. When one recalls how aristocracies in the past actually behaved, the prospect is not cheerful. – W. H. Auden