
My imagination is very sluggish. It comes in random fits and starts. It can be bubbling away furiously for a while and then suddenly it stops dead and refuses to yield anything for hours on end.
This is why I couldn't be a full-time writer. I've tried to write a novel but got total writer's block after around 100 pages. Despite every attempt to get the flow going again, my imagination obstinately failed to cooperate.
Without a constantly freewheeling imagination, I'm often stuck firmly in the prosaic everyday reality, getting bored with the familiar routine but unable to transcend it, unable to drift into a parallel consciousness of tantalising images and scenarios.
I like to think that if I had a fizzing imagination, my life would taken all sorts of spectacular twists and turns that would have transformed it from a fairly predictable middle-class lifestyle to something much more extraordinary.
Not that I'm complaining about how my life has gone, far from it, but I'm sure the strength of our imagination can make a big difference to the richness and vitality of our lives.
Of course imagination has also been responsible for some of the worst horrors of human existence - nuclear bombs, Nazism, torture, slavery - but if we had no imagination at all, the world would be a grim and oppressive place indeed. Change would be impossible. We would be frozen in a permanent Stone Age.
Imagine that.