The whole 'Melrose' series is an attempt to tell the truth, and is based on the idea that there is some salutary or liberating power in telling the truth.
Proust is a hero of mine. I read 'A la recherche' in one go, and I'm a very slow reader. It had an astonishing impact, reading it on my own and being my main company. I think Proust is the most intelligent person to ever have written a novel.