Isabel Menzies Lyth, Eric Rayner, Dilys Daws, Barry Richards, Eric Rhode, Paul Gordon, Margot Waddell, David Armstrong, Nicola Worledge, Kirsty Hall, Jane Kitto. I have reflected on all of their suggestions and have followed most of them, but I have sometimes found no alternative to what I'd originally tried to capture, for fear of losing the flavour of an idea. All of those who have given help will, I trust, appreciate that form of stubborn attempt to find my own voice, even at the expense of some inelegances. I accept that I may have got some things wrong, even badly wrong. If that turns out to be so, in spite of all my efforts to be accurate and to take good advice, I will console myself with the thought that my attempts to achieve clarity for myself and for others will have served a worthwhile purpose.
Truth emerges more readily from error than from mere confusion.
I am grateful to Jane and to Colin Brady for providing lists of errors in the first printed edition. I also wish to thank my patients and my students, with whom I seek to learn from shared experience.