There is a belief in India that there are some cobras that have light in their head, the light by which they find their way through the dark. They make a hole in the earth miles long and illuminate the hole by their own light, which is centered in their head. As two wires, positive and negative, cause the electric light to manifest, so the two currents of breath, Jelal and Jemal, when connected in a head in the way they ought to be, cause the light to manifest.