I take the walk to be the externalization of an interior seeking so that the analogy is first of all between the external and the internal.
“I hate biographies which say, I was called to such and such an office, and he offered me so and so, and I got so and so money. I find that very tedious. The best biographies are written by other people.”
“We never fail when we try to do our duty, we always fail when we neglect to do it.”