"In very remote times in India, thousands of years ago, these facts [extraordinary happenings] used to happen even more than they do today. It seems to me that when a country becomes very thickly populated, psychical power deteriorates. Given a vast country thinly inhabited, there will, perhaps, be more of psychical power there. These facts, the Hindus, being analytically minded, took up and investigated. And they came to certain remarkable conclusions; that is, they made a science of it. They found out that all these, though extraordinary, are also natural; there is nothing supernatural. They are under laws just the same as any other physical phenomenon... They can be systematically studied, practiced, and acquired. This science they call the science of Râja-Yoga."

- Swami Vivekananda, "The Powers of the Mind" (Jan 8, 1900, Los Angeles), Complete Works: Vol 2