If you liked reading this post, I highly recommend Vonnegut's Slaughterhouse Five. One of my favorite quotes, "So it goes," is repeated often throughout the book, and though it usually refers to tragic circumstances, it too hints that life will throw major wrenches in our plans that we shouldn't try to completely ascribe meaning to.
That's one of my favorite quotes and I almost mentioned it in the post. "So it goes" is mentioned 106 times in Slaughterhouse Five. After reading the book, I found myself saying it as often as 'good luck, bad luck, who knows?"