Rose Tremain

I have likened writing a novel to going on a journey, with some notion of the destination I will arrive at, but not the whole picture - which emerges gradually as a series of revelations, as the journey goes along.

Perhaps, more importantly, I think that most human beings realise only a fraction of the true potential of their minds, so the spiritual or mystical, the things which remain mysterious or unexplained have always drawn me to include them in any scheme for a novel.

It is only when you watch the dense mass of thousands of ants, crowded together around the Hill, blackening the ground, that you begin to see the whole beast, and now you observe it thinking, planning, calculating. It is an intelligence, a kind of live computer, with crawling bits for its wits.

And I think that still is true of this business - which is basically research and development - that you probably spend more time in planning and training and designing for things to go wrong, and how you cope with them, than you do for things to go right.