The mind that thought of light, heavy, grey, yellow, still, swift, also conceived of magic that would make heavy things light and able to fly, turn grey lead into yellow gold, and the still rock into a swift water. If it could do the one, it could do the other; it inevitably did both. When we can take green from grass, blue from heaven, and red from blood, we have already an enchanter's power.
J. R. R. TolkienStill round the corner there may wait A new road or a secret gate And though I oft have passed them by A day will come at last when I Shall take the hidden paths that run West of the Moon, East of the Sun.
J. R. R. Tolkien