"I have always loved butterflies. In Uganda I saw glorious butterflies the colour of whose wings changed from the deepest russet brown to the most brilliant blue, according to the angle from which you saw them. In Brazil as everyone knows there are butterflies of this kind even larger and more vivid. The contrast is extreme. You could not conceive colour effects more violently opposed; but it is the same butterfly. The butterfly is the Fact—gleaming, fluttering, settling for an instant with wings fully spread to the sun, then vanishing in the shades of the forest. Whether you believe in Free Will or Predestination, all depends on the slanting glimpse you had of the colour of his wings—which are in fact at least two colors at the same time."