Just before Mass started this morning, this picture appeared in my mind. God is light and this light fills the whole universe. But those who do not know the Lord do not see the light because they are all blindfolded. They bump into each other and into walls as they move about and try vainly to lead others also blindfolded. In sum, they don't know what they are doing! Then those who know the Lord, basking in his glorious light, know exactly what they are doing as they go about doing God's will.