The world is never quiet, even its silence eternally resounds with the same notes, in vibrations which escape our ears. As for those that we perceive, they carry sounds to us, occasionally a chord, never a melody.
The yogi should meditate on a firm seat, one that is clean – untainted by dirt or unspiritual vibrations of others. The thought or life force emanating from an individual saturates the objects he uses and his dwelling.
The ordinary man considers solids and liquids and the energy manifestations of the material world to be vastly different, but the yogi sees them as various vibrations of the one cosmic light.