Pause for a moment and stare at someone who is performing the most ordinary and obvious act in life, stare at him in such a manner as to cause the suspicion to arise in his mind that what he is doing is not clear to us, and that it may similarly not be clear to himself; do this, and his self-assurance at once is overcast and begins to waver. No crowd could be more disconcerting than that pair of unseeing eyes, eyes that do not see us, or which do not see the same thing that we do.
