Each piece in this series is based on a piece of text that speaks to the tension between wanderlust and roots:
"`Fun?' said the Rat; `now that's just what I don't understand. If you've GOT to leave this pleasant place, and your friends who will miss you, and your snug homes that you've just settled into, why, when the hour strikes I've no doubt you'll go bravely, and face all the trouble and discomfort and change and newness, and make believe that you're not very unhappy. But to want to talk about it, or even think about it, till you really need----'
`No, you don't understand, naturally,' said the second swallow. `First, we feel it stirring within us, A SWEET UNREST; then back come the recollections one by one, like homing pigeons. They flutter through our dreams at night, they fly with us in our wheelings and circlings by day. We hunger to inquire of each other, to compare notes and assure ourselves that it was all really true, as one by one the scents and sounds and names of long-forgotten places come gradually back and beckon to us.'"
-Kenneth Grahame, The Wind in the Willows