Ceaseless optimism about the future only makes for a greater shock when things go wrong; by fighting to maintain only positive beliefs about the future, the positive thinker ends up being less prepared, and more acutely distressed, when things eventually happen that he can't persuade himself to believe are good.

The effort to try to feel happy is often precisely the thing that makes us miserable.

Ask yourself whether you are happy', observed the philosopher John Stuart Mill, 'and you cease to be so.' At best, it would appear, happiness can only be glimpsed out of the corner of an eye, not stared at directly.

Who says you need to wait until you 'feel like' doing something in order to start doing it? The problem, from this perspective, isn't that you don't feel motivated; it's that you imagine you need to feel motivated. If you can regard your thoughts and emotions about whatever you're procrastinating on as passing weather, you'll realise that your reluctance about working isn't something that needs to be eradicated or transformed into positivity. You can coexist with it. You can note the procrastinatory feelings and act anyway.

...It's more important than ever that we find new ways to cultivate curiosity - because our careers, our happiness, and our children's flourishing all depend upon it.

The routines of almost all famous writers, from Charles Darwin to John Grisham, similarly emphasise specific starting times, or number of hours worked, or words written. Such rituals provide a structure to work in, whether or not the feeling of motivation or inspiration happens to be present. They let people work alongside negative or positive emotions, instead of getting distracted by the effort of cultivating only positive ones. ‘Inspiration is for amateurs,’ the artist Chuck Close once memorably observed. ‘The rest of us just show up and get to work.

The real trick to producing great work isn't to find ways to eliminate the edgy, nervous feeling that you might be swimming out of your depth. Instead, it's to remember that everyone else is feeling it, too. We're all in deep water. Which is fine: it's by far the most exciting place to be.