Humans consist of mostly subconcious subprocesses who ocassionally may guide the self-awareness decoration homunkuli on top into "ilusions of self-importance".
Ironically a time we concentrate the most, the subconciousness of it all can be felt almost directly.
https://en.wikipedia.org/wiki/Flow_(psychology)
But the subconcious may be active and working, if not under pressure to focus. All that is important, is to ocassionally think about the endgoal/question and thus keep the reward gates for continous processing open.
Tl,DR; The horse concerns itself little with the riders faces.