Source identified1
“For my part, I travel not to go anywhere, but to go. I travel for travel’s sake.”
Stevenson values movement and lived experience as ends in themselves, making the act of travelling more important here than reaching a prestigious destination.
Source note: Travels with a Donkey in the Cevennes, “Cheylard and Luc,” Project Gutenberg #535. Stevenson follows the sentence by calling movement “the great affair” and describing the physical needs and difficulties of the road; it is literary travel reflection, not contemporary destination guidance.