Facts, Values, Rights, and The Human Animal

The human animal is thought by some to have a "divine spark" in him. What is this? I don't mean, in a metaphysical or definitional sense. I mean, what do humans do, what capacity do they have, what power are they endowed with, that sets them apart from the other animals so much so that they are thought to have this spark? Why on earth would anyone say humans are "touched by the divine"?