People say we should always have positive expectations. But, for the sake of safety and sanity, we need a little cynicism and pessimism. We can't just assume, for example, that someone who has behaved atrociously will suddenly turn into a lovely person just because they say this is what they are intending to do. Nor, having just run a bath should we ever step confidently into it because we trust that it is going to be the perfect temperature. It is our ability to envisage a negative that stops us from being burned. I guess what I need to get my head around now is to "First run a test. Then get my hopes up!"