Can we really make a difference if we try? Or are we like children in a car on a fairground ride? We press on an imaginary accelerator. We stamp on a make-believe brake. We kid ourselves that our actions are having an impact but things would be just the same if we were to sit perfectly still. Now I am not trying to say that we are powerless. We all need to know the difference between the things we can change and the things we can't. Perhaps this is not just so that we can be spared unnecessary angst, there is a practical purpose. If we use up our vital time and energy pursuing impossible objectives, we will end up wasting the resources that might otherwise have been put to a truly constructive use. But if we seek success perhaps we should take energy away from a pointless pursuit and give it all to a worthwhile cause...only if everyone could undrestand that!