From The Brothers Karamazov by Fyodor Dostoyevsky:
You must know that there is nothing higher and stronger and more wholesome and good for life in the future than some good memory, especially a memory of childhood, of home. People talk to you a great deal about your education, but some good, sacred memory, preserved from childhood, is perhaps the best education. If a man carries many such memories with him into life, he is safe to the end of his days, and if one has only one good memory left in one’s heart, even that may sometime be the means of saving us.
…the cruellest and most mocking of us—if we do become so will not dare to laugh inwardly at having been kind and good at this moment! What’s more, perhaps, that one memory may keep him from great evil and he will reflect and say, ‘Yes, I was good and brave and honest then!’ Let him laugh to himself, that’s no matter, a man often laughs at what’s good and kind. That’s only from thoughtlessness. But I assure you, boys, that as he laughs he will say at once in his heart, ‘No, I do wrong to laugh, for that’s not a thing to laugh at.’