C.s. Lewis said this quote

You can’t see anything properly while your eyes are blurred with tears. You can’t, in most things, get what you want if you want it too desperately: anyway, you can’t get the best out of it. ‘Now! Let’s have a real good talk’ reduces everyone to silence. ‘I must get a good sleep tonight’ ushers in hours of wakefulness. Delicious drinks are wastedon a really ravenous thirst. Is it similarly the very intensity of the longing that draws the iron curtain, that makes us feel we are staring into a vacuum when we think about our dead? ‘Them as asks’ (at any rate ‘as asks too importunately’) don’t get. Perhaps can’t.