Magic

"3. Any sufficiently advanced technology is indistinguishable from magic."
- from Arthur C. Clarke's Three Laws of Prediction

"For the wise men of old the cardinal problem had been how to conform the soul to reality, and the solution had been knowledge, self-discipline, and virtue. For magic and applied science alike the problem is how to subdue reality to the wishes of men: the solution is a technique; and both, in the practice of this technique, are ready to do things hitherto regarded as disgusting and impious."
- C.S. Lewis, The Abolition of Man