Humans have been living on their periphery, through their organs of perception that look outward, through their periphery, the life that we call the horizontal plane.
On the horizontal plane what you see is the other. You don’t see yourself. You may feel your body, you may feel your feelings, but you don’t see yourself.
You see your effect on others. You see the other, that may be a reflection of you… if you can recognize it as such.