Control the mind, cut off the senses, then you are a Yogi; after that, all the rest will come. Refuse to hear, to see, to smell, to taste; take away the mental power from the external organs. You continually do it unconsciously as when your mind is absorbed; so you can learn to do it consciously. The mind can put the senses where it pleases. Get rid of the fundamental superstition that we are obliged to act through the body. We are not. Go into your own room and get the Upanishads out of your own Self. You are the greatest book that ever was or ever will be, the infinite depository of all that is. Until the inner teacher opens, all outside teaching is in vain. It must lead to the opening of the book of the heart to have any value.
- Swami Vivekananda
The Complete Works of Swami Vivekananda/Volume 7/Inspired Talks/Saturday, July 27, 1895. (Kathopanishad)