There are two sets of words I'm trying to keep in mind these days.
First, supposedly from Winston Churchill: "When you're going through hell, keep going."
And second, from myself, circa December 7, 2001:
And the world does indeed start to shake beneath your feet. When it stops, you find things around you slightly changed, although you can't say that anything's either remarkably better or remarkably worse. But when things inside you start shaking, too, you need to stop, look around, remember this: the soft thrill of walking in the newly sunny streets of a San Francisco morning. Or this: how full you feel when you're surrounded by your friends and laughing. And this: how every one of the experiences you've had this year, however brilliant or awful or gut-wrenching, has made you stronger, and has had something precious to teach.