"what people remember is distorted not only by the shortcomings of memory but by the myth-making of the rememberer".
This is not Julian Barnes 2011, but Penelope Lively 1984.
"We all know, with reference to our own lives, the curious ways in which truth can be not so much distorted as multi-faceted. Give the kaleidoscope a shake and different pictures form. each of us sees through a glass darkly, impeded not just by the frailties of memory but by our own conviction. We see what we persuade ourselves that we have seen ..." (Lively 1984, again)