Virginia Woolf said this quote

What one means by integrity, in the case of the novelist, is the conviction that he gives one that this is the truth. . . . When one so exposes it [integrity] and sees it come to life one exclaims in rapture, But this is what I have always felt and known and desired! And one boils over with excitement, and, shutting the book even with a kind of reverence as if it were something very precious, a stand-by to return to as long as one lives, one puts it back on the shelf.