“You see how bright the sun and the stars are. ‘Then shall the righteous shine forth as the sun’  from the inner immaterial light of God. Whenever the angels appear upon earth, they are almost always surrounded by light. Aspire to that enlightenment. Throw aside the works of darkness. We can raise our nature to communion with the Divine Nature; and God is the Light uncreated, surpassing every light that has been created.”
(St John of Kronstadt, ‘My Life in Christ’)