Here's a classic: There's a scene at the end of Requiem for Methuselah in the original Star Trek series. Kirk's love interest (I know, the latest in a long line) has died. He is sleeping with his head on a table and McCoy and Spock are looking on. McCoy says "You see, I feel sorrier for you than I do for him, because you'll never know the things that love can drive a man to. The ecstasies, the miseries... the broken rules, the desperate chances, the glorious failures -- and the glorious victories; all of these things you'll never know, simply because the word "love" isn't written into your book. Good night, Spock."
Spock replies, "Good night, doctor." Then, after McCoy has left, Spock does a Vulcan mind meld on the sleeping Kirk saying only the word "Forget . . . " thus illustrating that McCoy was wrong and that Spock feels compassion.