St Maximus the Confessor: When in the intensity of its love for God...

When in the intensity of its love for God the intellect goes out of itself, then it has no sense of itself or any created thing. 

For when it is illumined by the infinite light of God, it becomes insensible to everything made by Him, just as the eye becomes insensible to the stars when the sun rises.

St Maximus the Confessor