The Ethiopians here are the undisciplined and undeveloped thought forces in the subconscious mind. They are destructive. Zerah, as a leader of the Ethiopian army that came up against Judah, signifies the result of the first shining of new light into this darkened (Ethiopian) phase of thought, which result is that these ignorant and destructive thoughts are stirred to greater activity and so must be met and dealt with by Asa, king of Judah. Asa means physician, healing, curing, and represents the will directing constructively. Thus dark and destructive tendencies are put away and the light of Truth shines in one's consciousness.