"Once a journey is designed, equipped, and put in process, a new factor enters and takes over. A trip, a safari, an exploration, is an entity... no two are alike. And all plans, safeguards, policing, and coercion are fruitless. We find after years of struggle that we do not take a trip; a trip takes us."
Highly recommended book-- about a road trip he took around the USA with his poodle, Charley. Written in 1962 I think. Hilarious and perceptive.