William James once made an acute point about the relationship between happiness and expectation. He argued that satisfaction with ourselves does not require us to succeed in every endeavour. We are not always humiliated by failing; we are humiliated only if we first invest our pride and sense of worth in a given achievement and then do not reach it.

We are tempted to believe that certain achievements and possessions will give us enduring satisfaction. We are invited to imagine ourselves scaling the steep cliff face of happiness in order to reach a wide, high plateau on which we will live out the rest of our lives; we are not reminded that soon after gaining the summit, we will be called down again into fresh lowlands of anxiety and desire.

The most unbearable thing about many successful people is not - as we flatteringly think - how lazy they are, but how hard they work.

Distress at losing an object can be as much a frustration at the intellectual mystery of the disappearance as about the loss itself.

Rather than getting more spoilt with age, as difficulties pile up, epiphanies of gratitude abound.

It seems the only way to write a half decent book is to worry oneself sick on an hourly basis that one is producing a complete disaster.

The difference between hope and despair is a different way of telling stories from the same facts.