Vijnana Bhairava Tantra · Dharana 57 · Verse 80
A wall without pictures
Look at a blank wall, or at any solid object, with a steady, unmoving gaze. Do not decorate it with meaning. When the mind starts a lecture, return to the wall. The wall is not the point. The looking, unused by any story, is.
Older line
Fix an unmoving gaze on any solid object, and let the mind become free of thought and support. Very soon, one comes to rest in Shiva.