How does Shiva-yoga offer clairvoyance ?
The concentrated gaze generates psychic heat or Tapas which stirs into activity the pineal gland. This produces psychic light or Tejas which, in turn, leads to the release of Ojas or thought force, which is at once a power of vision and power of execution. Shiva-yoga therefore lands one into a region of effective will and intuitive knowledge where to will is to create, to think is to see.