... there is no quicker way of growing old than undue indulgence in regular habits. Indeed it seems probable that the reason why so many people die sooner than they should is because they have organised their lives in such a way that there is nothing left for them to do. Change, as is well-known, is not only a law of Nature, but the very breath of existence. And if you rule change out of your life there no longer seems any reason why you should continue altogether.