Those who have mastered the Surat Shabd Yoga, or the yoga of the clestical Sound Current, teach that the Absolute, though free of attributes in Its primal state, projects itself into form and assumes two primary attributes: Light and Sound. It is no mere accident, they point out, that in the revelatory literature of all major religions there are frequent references to the "Word" which occupies a central position in their pattern.
From the book "The crown of life", written by Sant Kirpal Singh