The vast majority of large scale change efforts fail. Which means that the probability that you have actually experienced a failure and your people know that and are pessimistic therefore about trying something again is very high.
I think you can learn as much from success as you can from failure.
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I believe my publisher has shown a great deal of faith in me over a lot of years but I'm not prepared to be so arrogant to say that the long-term literary value of my work would compensate them for a financial failure.
