Fearful Symmetry

Rudolf Steiner:  "If we did not possess two hands so that we can grip one with the other we would not be able to have any clear idea of our own self, our “I”. It is only because we can grasp the one hand with the other, the like with like, that the conception “I” is attainable in the right way. And just as we can cross the left hand with the right, as we experience ourselves, and are astonished at this experience, at experiencing ourselves, we also cross the axis of sight in our eyes, although this crossing is not so visible as that of the hands. And we have two eyes which we can cross for the same reason as we have two arms and two hands."

Source: The Rudolf Steiner Archive  March 28, 1919