Has your work become very easy? Do you find you can do it with little effort? Has it ceased to impose any strain or fatigue upon you? Do you no longer feel loss of vitality after a long spell of it? Can you now do it as easy as water rolls off a duck's back? If so, look out! Do some stock-taking. Examine your output.... Work done with little effort is likely to yield little result. Every job can be done excellently or indifferently. Excellence necessitates effort-hard, sustained, concentrated effort.