Crowning Moment of Heartwarming: Sonya's final speech. She tells her uncle that, no matter how rubbish their life is, they can continue to work, and then they will finally rest.
We shall rest. We shall hear the angels. We shall see heaven shining like a jewel. We shall see all evil and all our pain sink away in the great compassion that shall enfold the world. Our life will be as peaceful and tender and sweet as a caress. I have faith; I have faith. My poor, poor Uncle Vanya, you are crying! You have never known what happiness was, but wait, Uncle Vanya, wait! We shall rest. We shall rest. We shall rest.