I opened up Gail Godwin's 2006 novel Queen of the Underworld--a "scantily-clad autobiographical novel set in 1950s Miami," according to Publisher's Weekly--to find this epigraph:
Caminante, no hay camino.
Se hace camino al andar.
which I recognized as the epigraph to another book, Carolyn Forche's 1976 Gathering the Tribes. A list of books or poems that share the same epigraph might be fascinating. Anyone know off-hand of any others?