Every man who possibly can should force himself to a holiday of a full month in a year, whether he feels like taking it or not.
I suspect James was onto something there. A long vacation can disconcert us in so far as it might force us to confront the fact that we are neither our occupations nor our routines, but something else perhaps.
It is easy enough to say such a thing, but until we chance to take a long vacation we do not actually see it. We do not actually experience the fact we are not our occupations nor our routines, and so the fact does not become a part of us.
Perhaps vacations are necessary least we take ourselves too seriously.