" While eyes are shut the pain will not subside,
They yearn to join with light that is outside;
It’s due to your eyes’ light’s attracting pull,
Which seeks light rays as soon as possible.
If your eyes feel some pain while open, then

When blocked of transient light, pain fills your eyes,
So you should open them, if you are wise... "

― Rumi , The Masnavi: Book Two