The other day I was walking down to the subway stop when I saw a big, black and white cat sitting at the edge of an alley. So I stopped to say hi. When I talked to the cat, he began to complain to me with big meows. That's when I realized I was standing in the sunbeam he had been enjoying. So I moved.
It's one of those old Trinitarian images: Father, Son, and Spirit as Sun, Beam, and Light. And it's the first lesson of ministry: don't block the light, and know how to get out of the way of the Son and Spirit, the two hands that the Father uses to embrace the world.