Mary Balogh said this quote

Did she ever feel nostalgia for any of her girlhood dreams? But life was made up of a succession of dreams, some few to be realized, most to be set aside as time went on, one or two to persist for a lifetime. It was knowing when to abandon a dream, perhaps, that mattered and distinguished the successful people in life from the sad, embittered persons who never moved on from the first of life's great disappointments. Or from the airy dreamers who never really lived life at all.