I was just reading an online version of Ralph Waldo Emerson's "Essay on Self-Reliance" (a long-time favorite), and came across this line:
"When we discern justice, when we discern truth, we do nothing of ourselves, but allow a passage to its beams. If we ask whence this comes, if we seek to pry into the soul that causes, all philosophy is at fault. "
And my natural response was: "WHENCE!"