Meta. Shem was the son of Noah, who typifies the spiritual in man. In the sons of Joktan we find many spiritual qualities suggested. Most of Shem's sons, however, were the heads of Arabian tribes, or are believed to have been. This shows that at the stage of man's development that the sons represent the spiritual is not established in consciousness firmly enough to bring forth fruit (Arabians stand for unproductive thoughts); yet the spiritual impulses and inner knowing of Truth are implanted in the depths of man's being from the beginning. Ultimately they will work out in his inner and his outer life.
Palms and palm trees denote victory and triumph; they are significant especially of the resurrection--of victory over the appearance of death and of the tomb. Ethereal lightness bespeaks illumination, fineness or purity of understanding; therefore Diklah, meaning palm tree, palm grove, ethereal lightness, denotes the inherent belief in man, in his inner spiritual or true self, that complete victory over all error and complete triumph in understanding and life are his heritage.