I ran across the quote in a good book called Lois on the Loose written by a young woman who left her cubicle in London to ride a 225cc Yamaha Serow trail bike from Anchorage, Alaska to Ushuaia, Tierra del Fuego, Argentina at the tip of South America.
There's an interesting article about the author Lois Pryce here and information about her motorcycle at this link.
She doesn't think the world is a scary place, and consequently is able to do things some people only dream of and others would never consider.
A little side-note on Robert Louis Stevenson.
He is considered one of the first outdoor adventure writers for his book Travels with a Donkey in the Cévennes written in 1879. He writes about the sleeping sack he designed saying "I was determined, if not to camp out, at least to have the means of camping out in my possession; for there is nothing more harassing to an easy mind than the necessity of reaching shelter by dusk, and the hospitality of a village inn is not always to be reckoned sure by those who trudge on foot."
His sleeping sack was 6 x 6 feet, waterproof, lined with sheepskin and so bulky it forced him to travel with the donkey to carry it.
The hull of his schooner the Equator is stored at the Everett waterfront.