"Oliver turned homeward, thinking on the many kindnesses he had received from the young lady, and wishing that time could come over again, that he might never cease showing her how grateful and attached he was. He had no cause for self-reproach on the score of neglect, or want of thought, for he had been devoted to her service; and yet a hundred little occasions rose up before him, on which he fancied he might have been more zealous, and more earnest, and wished he had been. We need be careful how we deal with those about us, when every death carries to some small circle of survivors, thoughts of so much omitted, and so little done - of so many things forgotten, and so many more which might have been repaired! There is no remorse so deep as that which is unavailing; if we would be spared its tortures, let us remember this, in time."
Charles Dickens, Oliver Twist, Chapter 33