Even as I read, I start to forget what I have read, and this process is unavoidable. It extends to the point where it’s as though I haven’t read the book at all, so that in effect I find myself rejoining the ranks of non-readers, where I should no doubt have remained in the first place. […] When it comes to books, we never read more than a portion of greater or lesser length, and that portion is, in the longer or shorter term, condemned to disappear. When we talk about books, then, to ourselves and to others, it would be more accurate to say that we are talking about our approximate recollections of books, rearranged as a function of current circumstances.

Pierre Bayard, How to Talk About Books You Haven’t Read (2007)