When things go wrong, we make promises to ourselves. We say, 'I shall never let this happen again.' We may well prove to be successful in our determination to uphold such a vow. But what if that success comes at a higher cost than we initially recognise? What if, for example, we dedicate so much time and energy to defending ourselves against an unfortunate recurrence that we have no resources left with which to fend off some other, far greater, threat? Be sure you know what your real enemy is today.