It appears, from all this, that our eyes are uncertain. Two persons look at the same clock and there is a difference of two or three minutes in their reading of the time. One has a tendency to put back the hands, the other to advance them. Let us not too confidently try to play the part of the third person who wishes to set the first two aright; it may well happen that we are mistaken in turn. Besides, in our daily life, we have less need of certainty than of a certain approximation to certainty. Let us learn how to see, but without looking too closely at things and men: they look better from a distance.