Sri Aurobindo
Letters of Sri Aurobindo
Volume III - Part 2
Fragment ID: 12592
The serpent is a symbol of force, very often a hostile or evil force of the vital plane. The sea is a symbol of a plane of consciousness. The white light is a manifestation of pure divine force descending from one of the truth-planes leading to the supramental.
The indication is that of a hostile vital force being expelled and the purifying light from above descending to illumine and deliver the part of the plane formerly occupied by it.