The sensuous eye is a horse,
and the light of God is the rider:
without the rider the horse is useless.
The light of God rides the sensuous eye,
and then the soul yearns for God.
How can a riderless horse
recognize the signs of the road?
God’s light enhances the senses:
this is the meaning of ‘Light Upon Light’
Rumi in his Masnavi 2.1290-1293.
More at: ‘Light Upon Light’ « Nooru’s Blog.