…freedom is of the essence; because you should be able to stop and go on, and follow this way or that, as the freak takes you
Our note: The reason he gives, in the same essay, for walking alone.
Verified in the full text of Walking Tours on Project Gutenberg · Project Gutenberg ebook #386 · Collected in Virginibus Puerisque, and Other Papers
Painted the same decade: Study for "A Sunday on La Grande Jatte", Georges Seurat, 1884