Fyodor Dostoyevsky said this quote

The poor girl ws keeping that student's letter as a precious treasure, and had run to fetch it, her only treasure, because she did not want me to go away without knowing that she, too, was honestly and genuinely loved; that she, too, was addressed respectfully. No doubt that letter was destined to lie in her box and lead to nothing. But none the less, I am certain that she would keep it all her life as a precious treasure, as her pride and justification, and now at such a minute she had thought of that letter and brought it with naive pride to raise herself in my eyes that I might see, that I, too, might think well of her.