Trading Faces

If I am I, because I am I, and you are you, because you are you, then I am I and you are you. But if I am I because you are you, and you are you because I am I—then I am not I and you are not you. Rabbi Menachem Mendel of Kotzk

The beauty that is borne here,
in the face,
The bearer knows not, but commends itself
To others' eyes: nor doth the eye itself
(that most pure spirit of sense)
behold itself,
Not going from itself; but eye
to eye oppos'd
Salutes each other with each other's form:
For speculation turns not to itself,
Till it hath travell'd, and is mirror'd there
Where it may see itself.  Shakespeare, "Troilus and Cressida"